Humans have only explored about 1% of our oceans — but what would happen if we could see all of it?

It might not be the answer you were expecting.

A new type of _Archaeopteryx_ fossil helps build the case for this creature being called ‘the first bird’.

Study casts doubt on so-called obstetrical dilemma.

Measurements of solar neutrino fluxes.

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