A new report says that using wood pellets to generate low-carbon electricity is a highly flawed policy.
Astronomers have discovered seven Earth-sized planets orbiting a single star - a record number.
A third runway at Heathrow can only be justified if it does not breach climate change laws, MPs say.
Is it possible to revive the woolly mammoth?
Fuelling the jet engine in a supersonic car
Once too precious to use, now too cheap to notice
How smartphones are helping to both catch and protect fish
Apollo 1 fire has had a far-reaching legacy
Tesla chief determined to engage with Trump White House
Stories from the natural world