Teller and Sagan debated fiercely over nuclear proliferation. But was the conflict as personal as it was intellectual for Teller?

When battles raged in ancient cities, their rocks blazed so brightly that they could be reoriented according to Earth’s magnetic field.

Along with obsidian that dazzled scientists in Canada.

Meet the people paid to rouse the workers of industrial Britain.

A sober look at a wild conspiracy theory that argues the Middle Ages never happened.

The Parthenon embodies the ideals of perfection Classical Greeks sought from architecture. The neighboring Erechtheion offers something else.

Today, the F-word is enjoying a renaissance the likes of which it hasn’t seen since, well, the Renaissance.

The volcano’s historic eruption preserved an ancient library, but rendered its content illegible. A public competition aims to change that.

Almost all royal lines try to legitimize their rule with legendary origin stories. Here are five of the strangest examples.

A marine reptile fossil from Svalbard challenges ideas about evolution and Earth’s greatest mass extinction.

They had the technology. So why didn’t they use it?

When Mongol traders came knocking, Sultan Muhammad II shaved off their beards. Three years later, his whole empire was annihilated.

One particular revolution was so important, that at least one historian thinks the 20th century officially began in 1914 and ended in 1991.