While genetic tests can reveal the ancestry of enslaved individuals, strontium analysis can now home in on where they actually grew up.

After Rwanda-backed M23 rebels took control of the biggest city in eastern Congo this week, the man who emerged from the shadows to assert his leadership was not the ...

Radio galaxies already feature mind-bending physics, with supermassive black holes accreting matter at the galactic core and sending out vast plasma jets that glow at radio frequencies. Those larger ...