A planet sculpted from cosmic violence. Earth is a very lucky planet. It has ended up the right size...

Earth protects itself from the sun. The David and Goliath story of Earth's relationship with its gre...

Earth gives birth to life. The building blocks of life are common across the universe, but life is r...

Earth, the great killer. Without the cycle of death and sacrifice, from cellular to planetary, life ...

We are all planets. Is it possible for intelligent life to escape destruction, either from the plane...

Earth's great paradox. For our planet to become inhabitable for life, you already need life. Ever si...

The freak accident behind complex life. All life on earth started as single cell bacteria and stayed...

Your brain is an anomaly. We tend to think that once the first life emerged it was inevitable that i...

There's no place like home. We wrap up the series with the story of NASA's most experienced female a...