Two landmark studies of a rare sperm whale birth observation in the Caribbean are reshaping scientists’ understanding of cooperation in the animal kingdom, revealing that whales in unrelated family ...

Japanese eels are born far out at sea. Their larvae drift toward the coasts of East Asia, where the young eels enter rivers, estuaries, and coastal waters. Years later, as autumn and winter arrive, ...

But methyl groups aren’t easily passed to the next generation: Fertilized eggs erase most of these marks from both sets of ...

Current World Health Organization (WHO) guidelines typically recommend two to seven days of abstinence before taking semen samples or assisted reproduction. However, a new study led by Oxford ...