The enigmatic "cenotes" of Mexico's Yucatán peninsula
Some of these sinkholes may have been formed by the impact of a meteorite around 65 million years ago. Here are the "cenotes" of Mexico's Yucatán peninsula.
The "water palace" was built in the 18th century by the raja of Jaipur state
How to protect against forest fires
Cotton-candy pink lakes in the south of France
Why sunscreen is so bad for the environment
Whales are worth quite a lot in terms of CO2 capture
This animal-only bridge is saving lives and wildlife