SpaceParallel universes could solve a big problem with black holes The black hole firewall paradox has been vexing physicists for years. But if quantum laws lead to the creation of other universes, the headache disappears ¿ìè¶ÌÊÓÆµ
TechnologyNew blues: The quest to make the world’s rarest colourNatural blue pigments to colour paints, inks and plastics are so hard to find that people will go to the depths of Earth to discover new onesFeatures