This new passive cooling paint reflects sunlight, emits heat and mimics sweating to cool buildings without air conditioning, even in the tropics.

Most spider species subdue dinner by injecting venom from their fangs. Feather-legged lace weavers swathe prey in silk, then upchuck a killing brew.

Variants of obesity-related genes influence how much weight patients lose on specific weight loss drugs like liraglutide, two studies report.