The latest screwworm outbreak in cattle has led to clashing ideas about how to control it.

New World Screwworm Outbreak Grows in Texas as U.S. Case Count Climbs ...

A major transition in evolution is the shift from asexual to sexual reproduction in early organisms. But why would a yeast ...

Taxidermied, locked behind plexiglass and spinning slowly on a wooden dais in the National Museum of Scotland in Edinburgh, UK, the world’s most famous ewe remains a public spectacle three decades ...

Reproductive physiologist Cara Wells says today up to 20% of transferred embryos have virtually zero chance of making a pregnancy and explains how video, AI and better selection can turn those losses ...

Female mammals have long thought to be born with all the eggs they would ever have, but new research is challenging that consensus ...

A new study of wild bats reveals that an animal's immune system is shaped by more than its need to fight infections. Researchers from the University of Maryland have found that sex, age and ...

The roots of Russia's invasion of Ukraine go back decades and run deep. The current conflict is more than one country fighting to take over another; it is — in the words of one U.S. official — a shift ...

Animals with larger brains produce fewer, larger offspring, explaining why birds evolved bigger eggs than the largest dinosaurs.