Seventy million years ago, a feathered, flightless dinosaur known as an oviraptor squatted over a carefully arranged ring of blue-green eggs. Yet paleontologists have always struggled to understand ...

Could ancient humans really have built the pyramids without extraterrestrial help? Or do such questions reveal more about modern anxieties than the past itself?

The planet orbits a small red dwarf star around 35 light years from Earth and is five billion years old ...