Conservation data adds another layer of urgency. Chimpanzees are listed as endangered, and populations have shown declines ...

Most people who spot a black widow in the garage or a brown recluse behind the water heater reach for the nearest shoe. That instinct, while understandable, may be exactly the wrong move. The venom ...

The timing is deliberate. As governments and private companies move from test flights to talk of permanent settlements, the ...

Scientists at Michigan State University have uncovered the molecular “switch” that powers sperm for their final, high-speed dash toward an egg. By tracking how sperm use glucose as fuel, the team ...

Human newborns arrive remarkably underdeveloped. The reason lies in a deep evolutionary trade-off between big brains, bipedalism and the limits of motherhood.

Scientists have documented same-sex behavior in many animals. Learn what it means, how it varies, and why human labels can mislead.

Both the UK and US Governments have pledged to end research using animals, but is such a goal realistic? And how might it change medical research? Talha Burki reports.

Noise pollution from traffic, construction and other human activities are impacting birds' behavior, physiology and even their reproduction.

With billionaires racing to open up space tourism and plans for Mars colonies taking shape, scientists are warning that we ...

Space is a toxic cocktail of radiation and weightlessness that is hostile to terrestrial biology. As missions stretch from ...

As space travel expands, scientists warn that reproductive health risks and ethical gaps can no longer be ignored.

Another experiment aboard the ISS examined whether key sperm maturation steps required for fertilization could proceed in ...