We continue to search for intelligent life elsewhere in the universe. But if we find ET there are those who question whether we should make contact or not.
Fifty years on from a groundbreaking paper, geophysicists have progressed from believing continents never moved to thinking that every movement may leave a lasting memory on our planet.
The Earth is full of many varied species from the largest mammals to the tiniest organisms. But we now think there could be ten times more species than was originally thought.
Earth is the only planet in our solar system with both plate tectonics and life. Is there a connection?
A new theory could explain why the key molecules of life - DNA and RNA - only come in one of two possible forms.
Ask any anthropologist what they do and they will find it hard to give you a direct answer. But it ultimately comes down to studying people and their culture.
A new theory could change our understanding of the moons in our solar system – and the genesis of life itself.
As the list of known planets beyond our solar system grows, the search for their moons is intensifying. One reason: they might hold the key to finding life elsewhere in the universe.