Impactscommons.wikimedia.org Prince of darkness Helmet jellyfish have taken over a Norwegian fjord, demonstrating the species’ tenacity and offering clues about environmental factors that can upend an ecosystem.
Newsletter As climate change thaws mountain tops, risks of rockfalls surge Boulders and rocks long frozen into place are being loosen and tumbling downslope.
Impacts National parks are being overrun by invasive species Causing more habitat damage than natural disasters, these creatures put native wildlife at risk. Here’s how you can help stop them.
