Somewhere along the way to adulthood, time to play fades away. We tend to trade silliness and imagination for seriousness and busyness. Yet there is clear evidence that adults benefit from playfulness ...

Immediately after the Big Bang boomed, the Universe was a trillion-degree 'soup' of unimaginably dense plasma.

Haolong is known only from a single specimen – an almost complete skeleton stretching 2.45 meters (8 feet) long, with stunningly preserved skin. Intriguingly, the bones suggest it was still a juvenile ...

New techniques to detect Y chromosome genes show frequent loss of the Y in tissues of older men. The increase with age is clear: 40% of 60-year-old men show loss of Y, but 57% of 90-year-olds.

In places like Chernobyl and Fukushima, where nuclear disasters have flooded the environment with dangerous radiation, it makes sense that life might evolve ways to survive it.

This week in science: the generational effects of nuclear radiation discovered in the children of Chernobyl cleanup workers; simple habits that could reduce your risk of dementia; a new light therapy ...