Latest stories
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Antarctic Icefish Have Nearly Colorless Blood Because They Lost Hemoglobin
Antarctic icefish are the only known vertebrates to completely lose hemoglobin, leaving them with pale blood and a radically reworked circulatory system.
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The ‘Immortal’ Jellyfish Can Reverse Its Life Cycle and Start Over
Turritopsis dohrnii can reverse from an adult jellyfish into an earlier polyp stage and begin its life cycle again.
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Some Sea Slugs Steal Chloroplasts and Become Solar-Powered
Some sea slugs steal chloroplasts from algae, keep them working inside their own cells, and use photosynthesis to help power their bodies.
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Axolotls Can Regrow Entire Limbs. Biology Is Showing Off.
Axolotls can regrow lost limbs with bone, muscle, skin, nerves and digits—and scientists study how they rebuild complex tissues so accurately.
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Shark Ancestors Were Swimming Before the First Known Trees Grew
Confirmed shark scales date to about 420 million years ago, while trees arose in the Middle Devonian tens of millions of years later.
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Male Pufferfish Build Giant Geometric Sand Circles to Attract Mates
Male pufferfish only about 10 centimeters long build elaborate geometric sand circles roughly 2 meters across as part of courtship and nesting.
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Crows Remember Your Face—and They Can Warn Other Crows About You
American crows can remember threatening human faces for years and spread that information to other crows. The research is somehow even stranger than the headline.
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Bananas Are Berries, but Strawberries Aren’t. Botany Is Weird.
Bananas are botanical berries, while strawberries are aggregate accessory fruits. The difference comes down to how each fruit develops from a flower.
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A Day on Venus Is Longer Than a Year on Venus
Venus takes about 243 Earth days to rotate once but only about 225 days to orbit the Sun. And that’s only the beginning of its strange…
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Octopuses Have Three Hearts—and One Stops Beating When They Swim
Octopuses have three hearts, blue blood, and one heart that temporarily stops during jet-propelled swimming. Here’s why.