June 30, 2018 - A comet from the stars, microbiome and arthritis, polar bear treadmill and more
Also decompressing fish, finding past civilizations and how much sleep do animals need?
Quirks and QuarksA newly discovered species of reef fish from the genus Tosonoides that rode the decompression chamber to the surface. Its vivid colours would be invisible in the twilight zone. (Luiz Rocha © California Academy of Sciences)