Tom Metcalfe

The largest map of the universe reveals giants at the birth of the universe

The image hints at a longstanding mystery

At most, its oceans may contain biomass equivalent to a small dog

An explanation for the abundance of super-Earths

It starts with static electricity and dust swirling around young stars

A scientist floats a new idea for exploring Earth’s twin

The pull of the planets is still one of our best bets for space exploration

It’s a bigger challenge than we thought

Earth’s most distant space probes prepare for their inevitable long night.

The formidable challenge of digging through miles of ice millions of miles away.