It's tempting to think that, with our fancy electric lights and indoor bedrooms, humanity has evolved beyond the natural influence of sunlight when it comes to our sleep routines. But new research shows that our circadian rhythms are still wild at heart, tracking the seasonal changes in daylight.

An analysis of data from a national health survey conducted before the pandemic found that pizza, soup and chicken are some of the main sources of sodium (salt) intake for people in all racial and ethnic groups. The study also showed clear differences among adults based on race and ethnicity.

A new species of velvet worm, Peripatopsis barnardi, represents the first ever species from the arid Karoo, which indicates that the area was likely historically more forested than at present. In the Cape Fold Mountains, we now know that every mountain peak has an endemic species. This suggests that in unsampled areas there are likely to be additional novel diversity, waiting to be found.

Parasitic worms that infect humans are not interbreeding with those that infect cattle as previously thought. This is good news for when it comes to controlling schistosomiasis, a disease caused by these worms that affects more than 200 million people globally.

The protein DNase1 is one of the oldest biological agents in history: It has been on the market since 1958 and is now used, among other things, to treat cystic fibrosis. However, it takes considerable effort to produce it in immortalized hamster cells. This process is also costly. It would be far more cost-effective to produce it with undemanding yeast cells.

Palaeontologists have analyzed the most complete stegosaurian skull ever found in Europe and rewritten the evolutionary history of this iconic group of dinosaurs.

Scientists have developed a unified theory for mathematical parameters known as gauge freedoms. Their new formulas will allow researchers to interpret research results much faster and with greater confidence. The development could prove fundamental for future efforts in agriculture, drug discovery, and beyond.

Chemists have demonstrated how RNA (ribonucleic acid) might have replicated itself on early Earth -- a key process in the origin of life.

'Biomarkers' may help to improve detection and treatment of gastrointestinal diseases such as gastric cancer, colorectal cancer, and inflammatory bowel disease.

Researchers find high-fat diets set off metabolic dysfunction in cells, leading to weight gain, but these effects can be reversed by treatment with an antioxidant.

A team identified herpes virus saimiri, which infects the T cells of squirrel monkeys, as a source of proteins that activate pathways in T cells that are needed to promote T cell survival.

In a major leap forward for genetic and biomedical research, scientists have developed a powerful new artificial intelligence tool that can predict the 3D shape of chromosomes inside individual cells -- helping researchers gain a new view of how our genes work.

The timing and consistency of your daily activity might be associated with improved cardiorespiratory fitness and walking efficiency.

Scientists show that wolves that are eating sea otters in Alaska have much higher concentrations of mercury than those eating other prey such as deer and moose.

Many bat species native to Germany, such as the Leisler's bat, are forest specialists. However, as it is becoming increasingly hard for them to find tree hollows in forest plantations, so they are moving to settlements instead. Using high-resolution GPS data from bats, a team led by scientists has analyzed in greater detail than ever before how Leisler's bats use their habitats, which tree species they look for when searching a roost, and which forest types they avoid. They found that these bats increasingly seek refuge in old trees in urban areas and in old buildings such as churches.

The aging of the innermost cell layer of blood vessels leads to cardiovascular diseases. Researchers have now shown for the first time that intestinal bacteria and their metabolites contribute directly to vascular aging. As people age, the bacterial composition in their gut changes, resulting in fewer 'rejuvenating' and more harmful substances in the body.

A new study finds that chronic cannabis use -- whether it's smoked or consumed in edible form -- is associated with significant cardiovascular risks.

Involving communities in nature-based solutions to tackle urban climate and environmental challenges leads to innovation and multiple benefits, a study shows.

As rising global temperatures alter ecosystems worldwide, animal species usually have two choices: adapt to changing local conditions or flee to a cooler clime. Ecologists have long assumed that the world's bird species were best equipped to respond to the pressures of climate change simply because they have the option of flying to higher altitudes or towards global poles. But a new study finds that few bird species are able to escape the realities of a warming world.

Researchers have released new insights on a pilot program involving all-electric buses in Ithaca, NY, USA -- with implications for cities, schools and other groups that are considering the electrification of their fleets, as well as operators, policymakers and manufacturers.