Biology

Gender-affirming care attacked by right-wing groups is being reaffirmed by medical reviews and in the courtroom

Clicklike noises made by a small species of shark represent the first instance of a shark actively producing sound

A riotous photography collection from a recent underwater mission off the coast of Chile shows new and fascinating deep-sea creatures—including a “mystery mollusk,” a bioluminescent jellyfish and a “sea pig”

What we learned about ape and human cognition from Kanzi the bonobo, who died this week

Studies of the horns, spikes, plates and clubs of dinosaurs could help settle a long-standing debate over their function

A genetic analysis reveals that Fiji’s iguanas are most closely related to lizards living in North America’s deserts. How is this possible?

Charged water droplets generate sparks that can forge organic compounds

Animal emotions—including joy—may be key markers of conscious beings

Ants’ tactics to avoid traffic jams could be applied to future self-driving cars

On its quest to bring back the extinct woolly mammoth, Colossal Biosciences has developed the woolly mouse

Mouse and human studies suggest a connection between a gut microbe and the appetite-regulating hormone GLP-1

Memes about repeated evolution of crabs have been co-opted to joke about technology and “ultimate forms.” They’re hilarious, but they oversimplify natural variation, giving bad arguments a scientific veneer