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Much of the genome is made up of repetitive DNA sequences that trace back to ancient mobile elements, many of which have lost their ability to copy themselves into new locations but can still cause problems if they become ...

In K–12 schools across the country, administrators are tasked with keeping everyone safe. New research shows they may be the most in need of protection.

Researchers have long known that there is an asymmetry in the El Niño-Southern Oscillation (ENSO), the confluence of wind and water currents that creates warm El Niño events and cooler La Niña events. Large-scale climate ...

When a human cell prepares to split into two daughter cells, it must first construct a tiny internal machine called the mitotic spindle—a structure of protein fibers that physically pulls chromosomes apart and deposits one ...

Researchers at the University of Gothenburg have identified clear links between the composition of gut bacteria and frailty in older women. In cases of high frailty, with an increased risk of illness and death, gut bacterial ...

One of the uncomfortable truths about multiple sclerosis is that the part of the brain likely to reveal the most about the disease and how a patient will be affected has been mostly invisible to clinicians.

The European Space Agency's Euclid space telescope has discovered 31 of the most ancient quasars ever found. Two of these giant and dazzling galaxy cores, powered by gargantuan black holes, are the earliest quasars yet observed ...

Individuals seeking abortion face considerable challenges, including high costs, logistical difficulties such as travel and dependent care, and fear of stigma. In recent years, access to care has improved through telehealth ...

Mud volcanoes are often pictured as dramatic geological phenomena featuring the sudden eruption of large volumes of fiery mud in short, powerful bursts. By examining recent activity at the Lokbatan mud volcano in Azerbaijan, ...

Scientists have long posited that the earliest water animals to transition to land had amphibious tadpole features, going through a metamorphosis akin to that of today's frogs.

A Japanese space probe performed a flyby of a near-Earth asteroid on Sunday in a test mission for technology that could help protect the planet from space rocks.

Research has shed intriguing new light on the genetics underlying the diverse plant organ shapes seen in agriculture and nature. Despite more than a century of scientific investigation into the role of inner and outer tissues, ...