Outdoors
Seasonal allergies seem worse this year. Experts explain why it may feel like it
Habitats
Warming waters have caused bull sharks to act differently
Animals
How sharks sense 'bad' weather coming, and where they go to hide
Meet 'Saltwater Sean': The diver cleaning up the Atlantic one bottle at a time
Trash 'island' on Guatemalan lake poses health risks, threatens livelihoods
Why dogs need more help than cats in extreme heat
Dogs sweat in the summer, too, but can a haircut cool them off?
Hoards of giant viruses live in Arctic ice—and they may be protecting it
New Brunswick invasive species council raises alarm over harmful rose