Some shallow seafloor depressions off the coast of Germany that look like those associated with methane might instead be the work of porpoises.
unsolved mysteries
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Did a Cosmic Explosion Make the Ionosphere Dance?
Researchers have linked a 2022 gamma ray burst to a disturbance in the upper atmosphere, but proving the connection highlights the problems with this kind of measurement.
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Steamy Bubbles May Control Old Faithful’s Clock
Scientists built a minigeyser to show why the natural wonder’s water surges so violently between eruptions.
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Lightning Struck Down as Source of a Venus Whistler
Whistlers were a key piece of evidence in favor of Venusian lightning. New measurements question the connection.
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Ocean Vessels May Trigger Lightning Strikes
Previous research indicated aerosols in ship exhaust could enhance lightning. New research indicates the ships themselves may be to blame as well.
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Here’s How Artemis Astronauts Will Navigate on the Moon
The next wave of lunar explorers is headed to terrain that promises to be both stunning and challenging. Here’s how they’ll cope with some of the difficulties they’ll encounter.
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Arrokoth’s Mounds Hint at How Planetesimals Form
The most remote world ever seen up close is a mash-up of smaller pieces.
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Did These Curious Rock Formations Inspire the Great Sphinx?
New research says it’s plausible the Great Sphinx started life as a geomorphological oddity known as a yardang.
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Five Martian Mysteries That Have Scientists Scratching Their Heads
Despite centuries of study and many spacecraft visits, the Red Planet still holds secrets. Here are just a few.
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Water Corridors Helped Homo sapiens Disperse out of Africa
Wetland conditions during the last interglacial period in parts of the Levant helped propel our ancestors into Arabia, new research suggests.