Notebook

Planetary Science

Long-lost ‘extinct’ meteorite found

A newly discovered meteorite, nicknamed Öst 65, may have originated from the same collision that formed L chondrites, one of the most abundant groups of meteorites on Earth.

Chemistry

Movie viewers’ exhaled chemicals tell if scene is funny, scary

Changes in trace gases exhaled by movie audiences could point the way to a subtle form of human communication.

Plants

Scary tomato appears to bleed

A new species of Australian bush tomato bleeds when injured and turns bony in old age.

Psychology

Kids’ anxieties, depression need attention

Psychological troubles in childhood are no longer considered a part of normal development.