Save the Frogs Day is today, Tuesday, April 28

Save the Frogs Day - a global amphibian conservation effort - is Tuesday, April 28, 2026. Amphibian health is an important marker of ecosystem quality.

Join the worldwide 2026 City Nature Challenge this weekend!

This weekend, April 24-27, 2026, join the global City Nature Challenge and record the biosphere in your neighborhood to help track real-time change.

Happy Earth Day! Why do we celebrate it on April 22?

April 22 is the date of Earth Day in part because of Arbor Day, an earlier observance. The focus for 2026 is "Our Power, Our Planet."

International Dark Sky Week is April 13 to 20

Celebrate dark night skies and limit light pollution by raising awareness with International Dark Sky Week, April 13 to 20, 2026. Find links here.

Native Americans played dice more than 12,000 years ago

Native Americans played dice games more than 12,000 years ago. That's 6,500 years earlier than Bronze age people in the Old World did.

Pareidolia is seeing things like faces in random objects

Seeing things such as a creepy face in satellite imagery is called pareidolia. Now, a new study says we're more likely to see angry men in random objects.

Comet Hale-Bopp closest to the sun 29 years ago today

Comet Hale-Bopp was at its closest point to the sun 29 years ago today. It was widely seen from the Northern Hemisphere. When will we see it again?

The April birthstone is the diamond, the hardest known gem

Happy birthday, April babies! The April birthstone, the diamond, is the hardest of the known gems. And it's a popular choice for engagement rings.

Biggest earthquake in North America 62 years ago today

On Good Friday, March 27, 1964, south-central Alaska heaved under the biggest earthquake recorded in North America, registering a 9.2 on the Richter scale.

Moon base and Mars! NASA makes exciting announcements

Moon base and Mars mission! NASA administrator Jared Isaacman announced them as part of a series of new NASA initiatives on March 24, 2026.

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