Animals
Why dogs need more help than cats in extreme heat
Dogs sweat in the summer, too, but can a haircut cool them off?
Warming waters have caused bull sharks to act differently
Meet 'Saltwater Sean': The diver cleaning up the Atlantic one bottle at a time
Hoards of giant viruses live in Arctic ice—and they may be protecting it
Seasonal allergies seem worse this year. Experts explain why it may feel like it
Trash 'island' on Guatemalan lake poses health risks, threatens livelihoods
Avoid at all costs: What makes giant hogweed so dangerous