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

Radiation within the visible spectrum can appear black if it is low in power – more specifically, lower in power than its surroundings. Additionally, radiation outside the visible range of wavelengths ...

You absolutely crushed our January 'B&W Street' photo challenge! See some of the stunning black-and-white street photos from your fellow DPReview photographers.