The global river crisis is worsening. Learn about the causes behind the decline of vital waterways and their significance.
In ancient Egypt, what was the Sphinx all about? – Effie, age 8, New Plymouth, New Zealand. One of the most mysterious and ...
Experts warn that an unchecked push for hydropower dams, transmission lines, and energy corridors could take even a heavier ...
Triops are so old that they are considered living fossils and will eat anything possible, including earthworms.
The endangered big cats are hanging on in Russia, the first country-wide survey of the animal suggests, while scientists and ...
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