22/03/2023

Humanity has 'broken the water cycle,' UN chief warns

The future of humanity's "lifeblood"—water—is under threat worldwide, the UN secretary-general warned Wednesday at the opening of the global body's first major meeting on water resources in nearly half a century.

A surprisingly simple explanation for 'Oumuamua's weird orbit

In 2017, a mysterious comet dubbed 'Oumuamua fired the imaginations of scientists and the public alike. It was the first known visitor from outside our solar system, it had no bright coma or dust tail, like most comets, and ...

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