More on Sargassum

Spring and summer 2018 saw yet another Sargassum bloom to the Caribbean, with piles of the stuff floating nearshore and ­covering beaches in Little Cayman, ­Barbados, ­Antigua, and other destinations. Read about why that happened and how divers can work around it.

Coral reef ecosystems in trouble

Coral reefs cover less than 1 percent of the Earth’s surface yet feed and shelter a significant amount of marine life and provide food, coastal protection, and livelihoods for millions of people. Read about the state of the world's coral reefs in this PBS Nature Blog post. Spoiler alert: it isn't pretty. 

When Light Becomes Pollution

Artificial light at night affects wildlife in many ways, including, according to some recent studies, by increasing predation on insects, decreasing amphibian reproduction, and interfering with nocturnal pollinators. Read more about the problem and easy solutions in this PBS Nature Blog post.

Image: NASA Earth Observatory