The $20 billion project is an amazing construction feat. But was it worth it?

Researchers have discovered what they say is the world’s oldest intact shipwreck at the bottom of the Black Sea. Until now, the ship had only been seen on pottery.

Oops…

Pilot study finds plastics in poo samples from eight countries. Nick Carne reports.

Three relatively strong earthquakes that began Sunday night in the Pacific Ocean off Vancouver Island didn’t trigger a tsunami because they happened along a fault line where sections of the Earth’s crust are moving sideways, says an earthquake seismologist with Natural Resources Canada. .

These are bleak times — but a lot of things are improving.

Seismologists from from the Australia National University (ANU) have found the first conclusive proof that the Earth’s innermost core is solid after 80 years of searching.

Aristotle called it the fifth element. Alchemists thought it was the key to the philosopher’s stone. Scientists believed it was the stuff light moved through. But it never existed at all.