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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.
April 24, 2026
Waves on other planets vary widely, new MIT study suggests
A new study from MIT suggests that waves on other planets should vary greatly. Scientists are looking at the lakes and seas of Saturn's moon Titan for clues.
April 23, 2026
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."
April 22, 2026
A pileus cloud means bad weather is on the way
A pileus cloud looks like a curved, white cap on the top of a towering cumulus cloud. Pileus clouds are a sign that bad weather is on the way.
April 22, 2026
Small ants clean larger ants in a surprising twist of nature
Small ants clean larger ants, a researcher has discovered. It's the first known case of interspecies grooming between ants.
April 20, 2026
Hidden soil fungi stole bacterial DNA to control the rain
Some soil fungi have a superpower, inherited from bacteria. It means they can reach up into the atmosphere and pull down the rain.
April 16, 2026
Seattle waterspout! What are waterspouts and how do they form?
See the Seattle waterspout that formed in Puget Sound on Wednesday. Then read more about waterspouts, which are essentially tornadoes over water.
April 16, 2026
Ancestors of mammals laid eggs, says new fossil evidence
Scientists discovered a 250-million-year-old Lystrosaurus fossil that was still in its egg. It showed ancestors of mammals laid eggs.
April 14, 2026
The tree-kangaroo lives in the hidden world of the treetops
The tree-kangaroo lives high in the rainforest canopy, leaping, climbing and revealing a surprising side of marsupial life few have seen.
April 13, 2026
The Year Without a Summer: The chaos of 1816
1816 was The Year Without a Summer, following the eruption of Tambora in 1815. The haze was so thick, people could see sunspots with their eyes alone.
April 10, 2026
