Life & Evolution

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a leopard in a tree

Leopards are one of many big cat species that have proven difficult to track — but that are known to be in trouble nonetheless.

fruit fly and sperm

EXTREME SPERM  The most oversized male sexual feature yet documented may be a fruit fly’s giant sperm (right, one sperm at 200 times magnification from Drosophila bifurca; left, same magnification of male surrounded by a male reproductive tract).

cows in a field in Finland

Dosing cattle with antibiotics affects dung beetles and ups greenhouse gases emitted from cow dung, researchers suggest.

Life & Evolution

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