Jupiter approaches opposition.

The planet Jupiter will come to opposition (be directly opposite the Sun) at 8.34  am GMT on Saturday 10 January 2026. This means that it will be at its closest to the Earth this year, about 4.23 AU (4.23 times the average distance between the Earth and the Sun, or about 632 800 000 km), and completely illuminated by the Sun. While it is not obvious to the naked eye observer, the planets have phases just like those of the Moon; being further from the Sun than the Earth, Jupiter is 'full' when directly opposite the Sun. 

The relative positions of Earth, Jupiter, and the planets of the Inner Solar System at 8.00 am on Saturday 10 January 2026. JPL Small Body Database.

While the relative positions of the planets have no direct influence on life on Earth, the opposition of Jupiter does present the best opportunity for observations of the planet by Earth-based observers. On Saturday 10 January, Jupiter will appear as a bright object in the constellation of Gemini. Seen through a moderate sized telescope both the planet and its larger moons should be visible, although the Moon will be quite bright, being just before its third quarter, which may hamper viewing somewhat.

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The impact of the Roman occupation on the health of the ancient people of England.

The Roman invasion of England in 43 AD led to a profound social and environmental upheaval, which has generally been assumed to have been detrimental to the local population, who faced exposure to novel pathogens and restricted access to resources. Archaeological investigations have suggested that the people of Roman-occupied England were significantly less healthy than those of either the preceding Iron Age of following Early Medieval periods. However, data on Iron Age England is notoriously sparse, with only a few known burial sites, compared to the large number of Romano British cemeteries, potentially creating a biased perception of the health of Iron Age Britons.

The Iron Age itself was a period of profound change, with new methods of land management, social structures, and production technologies were introduced to Britain. However, this was not an even process, with fluctuations in the rate of change across the country. Burials from this period are rare, with most known burials being of individuals, which may not be representative of the population as a whole, and only a small number of burial grounds. 

The rate of change in ancient England accelerated sharply after the Roman occupation, with the introduction of new technologies and ideas from the continent, and a single administration governing the entire population. For the first time a significant difference between the upper and lower social classes appears in the archaeological record. However, research on this period has tended to concentrate on the wealthier Roman or Romanised sections of the community, which may lead to a distorted perception of its society.

The impact of the Roman occupation itself appears to have varied across the country, but the general trend appears to have been to place a strain upon the local population which did not lift until the fifth century. This was driven not just by exposure to new diseases and additional strains upon resources, but also by the imposing of a new system of social division which caused the greatest hardship to marginalised communities. Recent studies have shed light on the rates of infection,metabolic deficiencies, and growth disruption in Roman Britain, but similar studies on the population of Iron Age Britain, which would enable comparison, are missing.

Current models in anthropology and biomedical science suggest that the period between conception and the second birthday is crucial to healthy development, and that the environment of a child during this period can affect not just the health of the individual as an adult, but also that of subsequent generations. Thus, in archaeology, studying the remains of children can significantly increase our understanding of the pressures that a population faced, improving our understanding of the health of the community.

In a paper published in the journal Antiquity on 11 December 2025, Rebecca Pitt of the Department of Archaeology at the University of Reading presents the results of a study in which she compared the skeletons of children and women of maternal age (approximately 18-45) from rural and urban settlements in England from the fourth century BC till the fourth century AD.

Pitt selected 646 skeletons (274 women and 372 children) from 24 Iron Age and Roman sites. These included 116 women and 150 children from Iron Age sites, 63 women and 144 children from rural Roman sites, and 95 women and 78 children from urban Roman sites. 

The Iron Age sites were chosen from across England, to give a full scope of life in this period. However, because the Roman occupation of England is known not to have been similar everywhere, with a heavier military presence in the west and north. To try to ensure similarity of conditions at different Roman sites, Pitt selected remains only from sites in the south and central part of England, including Hampshire, Oxfordshire, Dorset, Northamptonshire, and Peterborough. These remains were additionally from the later part of the Roman occupation, to ensure that any developmental disorders detected were caused by the strain of living under Roman rule, not the initial disruption of the Roman invasion. Skeletons deemed to be from high status graves, as determined by the presence of stone sarcophagi or lavish grave goods, or by their placement in family mausoleums, were excluded.

Locations of sites with human skeletal remains selected for analysis; (left) Iron Age settlements; (right) Roman settlements and their proximity to Roman roads. Pitt (2025).

Each skeleton was analysed to determine its age at death and health status. Adult skeletons were also examined to determine their sex, though this was not done for child skeletons as there are no reliable markers before puberty. Skeletons were only included in the study if the cranial vault, thoracic spine and long bones were preserved. 

For the juvenile skeletons, priority was given to age determination by the formation, development, mineralisation and eruption of each tooth. If this was not possible, long bone diaphyseal lengths were used. Only skeletons deemed to be younger than 3.5-years-old (including foetal remains) were included in the study. 

Child skeletons were assessed for growth disruption, which is indicative of impaired health prompted by environmental stress, by comparing the expected diaphyseal long bone length to the age-at-death as determined by dental development. 

Both adult and child skeletons were analysed for dental and skeletal lesions, their locations, and whether they were healed or active at the time of death. The prevalence of such lesions within each community was determined by comparing the number of skeletons with a lesson on a skeletal element to the number of skeletons within which that element was present, for each population.

Six different types of lesion were included in the study: Dental enamel hypoplasia, defined as linear enamel defects across two or more bilateral teeth, cribra orbitalia, which presents as pores in the roofs of he eye sockets, dental disease such as caries or periodontal disease, bone infection, which manifests as layers of woven or dense lamellar bone, respiratory infections, such as sinusitis, visceral rib lesions, or tuberculosis, and metabolic conditions such as vitamin C deficiency, or vitamin D deficiency, which manifest as diagnostic modifications of the long bones, teeth, and other skeletal elements.

Of the 372 child skeletons included in the study, 146 of them (39.3%) were found to display some form of palaeopathological lesion, with dental enamel hypoplasia and bone infections being the most abundant. The proportion of children showing such symptoms varied from group-to-group, with 26% of Iron Age children (39 of 150 individuals) showing lesions, compared to 41% of rural Roman children (59 of 144 children) and 61.5% of urban Roman children (48 of 78 children). The most common pathologies were bone infections, found in 15.3% of Iron Age children, 21.8% of urban Roman children, and 28.5% of rural Roman children. Urban Roman children also showed high rates of metabolic conditions, which were found in 19.2% of these skeletons, and cribula orbata, found in 19.4% of urban Roman children. Dental enamel hypoplasia was found in 34.5% of urban Roman children, and 18.1% of rural Roman children, but only 4.5% of Iron Age children.

Roman non-adult pathology: (a) flattening of humeral heads, suggestive of vitamin D deficiency; (b) cribra orbitalia; (c) non-specific infection (distal femur); (d) new bone on the greater wings of the sphenoid bone, suggestive of vitamin C deficiency; (e) dental enamel hypoplasia on deciduous incisors, presenting as a grooved depression; (f) lytic foci on the proximal head of a radius, suggestive of tuberculosis. Pitt (2025).

It was possible to calculate whether growth has been disrupted in 142 of the individuals, with only 3.1% of Iron Age children showing such developmental issues, compared to 25.5% of rural Roman children and 51.9% of urban Roman children. This was most common in children over six months old, suggesting that children were protected by 'maternal buffering' before being born and while being breast fed, but began to falter as they were weaned. 

Of the 274 adult women included in the study, 189 (69%) showed symptoms of some form of health issue, with dental pathologies being the most common. Other conditions found included lesions with complex aetiologies, including congenital changes, osteochondroma, button osteomas and hyperostosis frontalis interna.

This was much more common in the urban Roman women (81.1%) than Iron Age women (62.1%) or rural Roman women (63.5%). Although dental pathologies were the most common overall, the prevalence of these did not vary greatly between populations. The majority of the difference between the groups appeared to be driven by metabolic conditions, which were found in 28.8% of urban Roman women, but only 4,3% of rural Roman women and 1.1% of Iron Age women. Respiratory infections were also much more common in urban Roman women, being found in 10.5% of individuals, compared to 0.9% of Iron Age women, and 3.2% of rural Roman women. Dental enamel hypoplasia, considered to be a sympton of stress, was also more common in urban Roman women, affecting 45.0% of individuals, compared to 19.0% of Iron Age women and 23.9% of rural Roman women.

Roman adult female pathology: (a) residual bilateral bowing of femora; (b) ‘chair-shaped’ pulp chamber of a first molar, indicative of vitamin D deficiency; (c) lytic lesions on a rib shaft, suggestive of tuberculosis; (d) non-specific infection (shaft of fibula); (e) cribra orbitalia; (f) dental enamel hypoplasia on permanent incisors. Pitt (2025).

Pitt's study reveals a marked decline in the health of both infants and maternal aged women during the Roman period, something which was particularly marked in urban areas. Previous studies on the health of fourth century urban populations in the UK have produced similar results, suggesting that this was not so much a Roman 'Golden Age' as it has traditionally been seen, but a time of fluctuating populations, with periodic overcrowding and nutritional stress. 

The rise in pathologies in Roman populations, and in particular in urban Roman populations, may have been caused by exposure to lead. Romans made extensive use of lead, using it to make everything from pipes to cooking utensils to toys, as well as using it as an additive in wines and foods. Because it was used in piping, even the poorest sections of urban Roman society are likely to have been ingesting lead, which can disrupt metabolic pathways leading to nutritional deficiencies even in people with good diets. Young children are known to be particularly vulnerable to this form of poisoning.  

Previous studies have suggested similar rates of metabolic problems in rural and urban populations, but Pitt found a significant difference between the two for both adult women and children. Children in rural Roman England appeared to be suffering higher rates of stress related pathologies and infectious diseases than their Iron Age predecessors, but there was little difference between rural Roman and Iron Age women. This may indicate that Roman occupation changed the lives of rural English populations less than is generally assumed, with local customs and ways of life persisting away from urban centres.

Iron Age Britain is often perceived as very regionalised, with communities in different parts of the country living very different lives, while the Romans are seen as having imposed a colonial administration with a centralised bureaucracy which imposed their version of civilisation throughout the land. However, recent studies have suggested that even under Roman occupation, the country remained quite diverse, with the adoption of Roman customs differing from area to area.

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Four fishermen killed by Hippopotamuses by Lake Naivasha, Kenya.

Four members of a group of ten fishermen have been killed after being attacked by Hippopotamuses by Lake Naivasha in Kenya on Friday 2 January 2025. The group, who have been described as local youths, approached the lake after dark as they lacked fishing permits, and are thought to have disturbed a group of Hippos with calves. Six of the party were able to escape by entering the water and swimming, or by climbing trees. One of the deceased is described as having initially escaped, but to have returned in an attempt to rescue a friend. 

Hippopotamuses by Lake Naivasha, Kenya. The Sunday Standard.

Lake Naivasha is noted for undergoing marked variations in its depth, and therefore extent. Water levels in the lake dropped continuously during the first half of the twentieth century, falling to 60 cm in 1945, then rose steadily for over two decades, reaching 6 m in 1968. The waters then fell until 1987, when the lake was only 2.25 m deep, but have been trending upwards since this time, causing the land to expand, swamping low lying villages and farmland, something which has accelerated in recent years as warming global temperatures have led to increased rainfall in East Africa.

One upshot of this that the lake naturally contains no commercially harvestable fish, probably as a result of drying up on occasions in the past. Non-native fish have been introduced to the lake in order to create a commercial fishery, but this has proven difficult to manage, with a dramatic fish-population crash fuelled by overfishing in 2001 leading to the introduction of strict fishing regulations on the lake.

This has created in a fish stock available to commercial fishing companies, and foreign tourists, but not to local villagers, resulting in frequent attempts to circumnavigate the regulations, for example by fishing at night. This has become more of a problem as the lake has expanded, swallowing up farmland and leaving the local population looking for other sources of sustenance. The expansion of the commercial flower growing industry, which earns the nation hard currency but also takes up farmland in the Rift Valley around lakes such as Naivasha and employs a relatively low number of people, has also tended to push people towards illicit economic activities such as night fishing, as well as fuelling conflict between Humans and aquatic wildlife such as Hippopotamuses and Crocodiles.

Flooding in a community beside Lake Naivasha in November 2025. Tony Karumba/AFP.

While Hippos can appear benign to people unfamiliar to them, they are generally considered to be one of the most dangerous Animals in Africa, and probably the world. Hippopotamuses are the largest land Mammals after Elephants and Rhinoceroses, as well as being the closest terrestrial relatives of Whales. Adult Hippos typically weigh about 1.4 tonnes (males tend to be slightly larger than females, but this is marginal, and the sex of Hippos can be hard to differentiate). Hippos can open their mouths to almost 110°, and their jaws are highly muscled, allowing them to slap there mouths shut abruptly, driving canine and incisor teeth that can be 50 cm long into anything which offends them. This weapon is primarily used in intraspecific fights particularly between the males, which are highly territorial. However, they are also notoriously aggressive towards other species, particularly Humans, possibly as a result as having evolved alongside Pliocene and Pleistocene hunting Hominids. Hippopotamuses tend to stay in the water during the day, lowering the threat they present to Humans, but come out of the water to graze at night, when they are generally considered to be at their most dangerous.

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Magnitude 6.5 Earthquake in Guerrero State, Mexico.

The United States Geological Survey recorded a Magnitude 6.5 Earthquake at a depth of 35.0 km, approximately 4 km to the north of the resort of Rancho Viejo in Guerrero State, slightly before 10.00 am local time (slightly before 2.00 pm GMT) on Friday 2 January 2025. This even was felt across much of southern and central Mexico, with at least two people having died, a 50-year-old woman in Guerrero State, and a 60-year-old man in Mexico City. At least 12 further people were injured by the event. 

The approximate location of the 3 January 2026 Guerrero State Earthquake. Contour lines show rates of movement during the quake, the red line is the Middle American Trench. USGS.

Mexico is located on the southernmost part of the North American Plate. To the south, along the Middle American Trench, which lies off the southern coast off Mexico, the Cocos Plate is being subducted under the North American Plate, passing under southern Mexico as it sinks into the Earth. Guatemala is located on the southern part of the Caribbean Plate, close to its boundary with the Cocos Plate, which underlies part of the east Pacific. The Cocos Plate is being pushed northwards by expansion of the crust along the East Pacific Rise, and is subducted beneath the Caribbean Plate along the Middle American Trench. This is not a smooth process, and the plates frequently stick together then break apart as the pressure builds up, causing Earthquakes in the process. 

The position of the Cocos, Nazca and Rivera Plates. MCEER/University at Buffalo.

The Cocos Plate is thought to have formed about 23 million years ago, when the Farallon Plate, an ancient tectonic plate underlying the East Pacific, split in two, forming the Cocos Plate to the north and the Nazca Plate to the south. Then, roughly 10 million years ago, the northwesternmost part of the Cocos Plate split of to form the Rivera Plate, south of Beja California.

In a paper published in the Journal of Geophysical Research, in 2012, a team led by Igor Stubailo of the Department of Earth and Space Sciences at the University of California Los Angeles, published a model of the subduction zone beneath Mexico using data from seismic monitoring stations belonging to the Mesoamerican Seismic Experiment, the Network of Autonomously Recording Seismographs, the USArray, Mapping the Rivera Subduction Zone, and the Mexican Servicio Sismologico Nacional.

The seismic monitoring stations were able to monitor not just Earthquakes in Mexico, but also Earthquakes in other parts of the world, monitoring the rate at which compression waves from these quakes moved through the rocks beneath Mexico, and how the structure of the rocks altered the movement of these waves.

Based upon the results from these monitoring stations, Stubailo et al. came to the conclusion that the Cocos Plate was split into two beneath Mexico, and that the two plates are subducting at different angles, one steep and one shallow. Since the rate at which a plate melts reflects its depth within the Earth, the steeper angled plate melts much closer to the subduction zone than the shallower angled plate, splitting the Trans-Mexican Volcanic Belt into sections above the different segments of the Cocos Plate, and causing it to apparently curve away from the subduction zone.

Top the model of the Cocos Plate beneath Mexico, split into two sections (A & B) subducting at differing angles. (C) Represents the Rivera Plate, subducting at a steeper angle than either section of the Cocos Plate. The Split between the two has been named the Orozco Fracture Zone (OFZ) which is shown extended across the Cocos Plate; in theory this might in future split the Cocos Plate into two segments (though not on any human timescale). Bottom Left, the position of the segments on a map of Mexico. Darker area is the Trans-Mexican Volcanic Belt, orange circles are volcanoes, brown triangles are seismic monitoring stations, yellow stars are major cities. Bottom Right, an alternative model showing the subducting plate twisted but not split. This did not fit the data. Stubailo et al. (2012).

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The Quadrantid Meteor Shower.

The Quadrantid Meteor Shower is one of the brightest meteor showers of the year, often producing over 100 meteors per hour at its peak, which falls around 3-4 January each year, and is predicted to peak at about 11.00 pm on Saturday 3 January 2026. Unfortunately, this coincides with the Full Moon this year, which may hamper viewing somewhat.

The meteor shower originates in the constellation of Boötes, high in the northern sky, which is slightly confusing, as most meteor showers are named for the constellation in which they originate. This is because the constellation was named in the sixteenth century by astronomer Tycho Brahe, before the introduction of standardised constellations used by modern astronomers, though to make matters a little more confusing, Brahe didn't name the meteors this way either; the name comes from the constellation of Quadrans Muralis, introduced by Joseph Jérôme Lefrançois de Lalande in 1795, and dropped by the International Astronomical Union in 1922. Because Boötes is visible only from the Northern Hemisphere, the Quadrantid Meteor Shower is not visible from the Southern Hemisphere, and is best viewed from northerly locations such as Canada or Scandinavia.

The radiant point of the Quadrantid Meteors (i.e. the point from which the meteors seem to radiate). American Meteor Society.

Meteor streams are thought to come from dust shed by comets as they come close to the Sun and their icy surfaces begin to evaporate away. Although the dust is separated from the comet, it continues to orbit the Sun on roughly the same orbital path, creating a visible meteor shower when the Earth crosses that path, and flecks of dust burn in the upper atmosphere, due to friction with the atmosphere.

The Earth passing through a stream of comet dust, resulting in a meteor shower. Not to scale. Astro Bob.

The Quadrantid Meteors are unusual in that they typically are only visible for a few hours either side of this peak, whereas other showers are typically visible for days or even weeks. This is thought to be because they originate from an asteroid (196256) 2003 EH1, rather than the tail of a comet as with most meteor showers. The orbit of this asteroid is tilted at an angle of 71.9° to the plane of the Solar System, so that the Earth only very briefly passes through the debris trail left by it, rather than remaining in it for some time, as is the case with the trail of a comet with an orbit in roughly the same plane as the Earth.

The calculated orbits and position (196256) 2003 EH1 and the planets of the Inner Solar System at 11.00 pm GMT on Saturday 3 January 2026.  JPL Small Body Database. 

(196256) 2003 EH1 is a 2.6-4.0 km diameter object with a 2017 day (5.52 year) orbital period, with an elliptical orbit tilted at an angle of 70.8° to the plain of the Solar System which takes in to 1.19  AU from the Sun (119% of the distance at which the Earth orbits the Sun) and out to 5.05 AU (505% of the distance at which the Earth orbits the Sun slightly inside the orbit of the planet Jupiter). This means that close encounters between the asteroid and Earth happen occasionally, with the last calculated to have happened in December 1936 next predicted in December 2052.  It is therefore classed as an Amor Group Asteroid (an asteroid which comes close to the Earth, but which is never closer to the Sun than the Earth is). (196256) 2003 EH1 also has occasional close encounters with the planet Jupiter, with the last having happened in June 1984, and the next predicted for March 2044.

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