Epigenetic clocks work by analyzing patterns of chemical tags called methyl groups that get added to or subtracted from DNA at predictable sites across the genome as animals grow older. Some of these ...

Most animals have a circadian clock that helps them distinguish night and day, but now researchers have found coastal animals seem to be equipped with a separate clock to track time via the tides.

The oldest fossilized remains of complex animals appear suddenly in the fossil record, and as if from nowhere, in rocks that are 538 million years old. The rapid arrival of animals so different to ...

The temperature hovers around freezing, but the sun is up for 24 hours each day. How do animals living in the continuous light of the Arctic summer know when to sleep and when to be active? Do they ...

The epigenetic clock measures biological age and could help scientists assess the health of polar bears, dolphins, baboons and other threatened creatures “while recovery is still possible” The ...