24 November 2021
The climate crisis means we must urgently cut the huge emissions from sea transport. Engineering tricks, cleaner fuels and a return to the age of sail could all help swab the decks clean
24 November 2021
Tanzania's Ol Doinyo Lengai is the only volcano known to spew out carbonatite lava, which could offer fresh clues about Earth's mysterious mantle – but getting hold of a sample is no simple matter
24 November 2021
We once shared the planet with at least seven other types of human. Ironically, our success may have been due to our deepest vulnerability: being dependent on others
