Science communicator Allan Blackman looks at a trial that's been labelled a "game-changer" in HIV prevention.
It showed a twice-yearly injection of antiviral drug lenacapavir prevented the contraction of HIV in more than 2000 African women.
Scientists had long thought the depths of the Pacific Ocean were a no-light - and therefore no plant-producing oxygen - zone.
But four km down, they found polymetallic nodules that make "dark oxygen". And physicists have worked out which paper is the worst for shredding your fingers.
Allan Blackman is a Professor of Chemistry, School of Science, Auckland University of Technology