Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet ...

Hikers in New Zealand risk polluting the “clearest lake in the world” with a microscopic alga carried on their boots.

Elliott is a student at the Cyril Potter College of Education and is currently teaching at the Early Childhood Centre of Excellence at the University of Guyana, Turkeyen campus.

For human visitors, an accessible overlook atop a 70-foot-high bluff reveals the blue oasis of the lake. During winter, a crust of ice normally freezes near the shore. Last winter, not so much.

Conservationists and the Ngati Apa iwi are reportedly concerned that the invasive algae Lindavia may contaminate Blue Lake. Also known as ‘lake snot’ due to its sticky, mucous-like appearance, this ...

An overlooked jewel hugging its very own lake—Lake Lugano—the city has long been a haven for writers and artists drawn to its palm tree-lined beauty, Alpine foothills, warm summer weather ...

Here are some of the best souvenirs to bring back from Istanbul, for all budgets and interests: Turkish towels (peshtemals) are one of the best souvenirs to bring back from Istanbul; they’re ...

Sustained blue light exposure from electronic devices and digital screens is not kind on your overall health, and has been linked to eye strain, macular degeneration and poor sleep quality.

To really impress your partner, we suggest picking up one of these 25+ unique Valentine’s Day gifts instead ... or charm like Old Blue Eyes, they’ll have the world on a string with impeccable ...