The most powerful public health official in the US is reviled by some medics - but even some of his critics accept that he is ...

In 2008 scientists reported that rocks in Canada were the world’s oldest. New data appear to confirm this contested claim ...

To celebrate Scientific American ’s 180th anniversary, we’re publishing a jigsaw every weekday to show off some of our most ...

Using new radiocarbon dating on ancient footprints found preserved in the gypsum-rich ground in White Sands, researchers have ...