7,733 results
- Earth
U.S. wells are pumping up groundwater from increasing depths
Around the United States, groundwater wells are getting deeper in search of new sources of freshwater, a new study shows.
- Planetary Science
Readers wanted to know about asteroids, lithium batteries and more
Readers had questions and comments about asteroids, lithium batteries, and pyroclastic flows.
- Health & Medicine
Kidney stones grow and dissolve much like geological crystals
Kidney stones are dynamic entities that grow and dissolve, a new study finds, which contradicts the prevailing medical assumption.
- Planetary Science
Ultima Thule may be a frankenworld
The first geologic map of Ultima Thule shows it might be made of many smaller rocks that clumped together under the force of their own gravity.
- Animals
A 50-million-year-old fossil captures a swimming school of fish
Analysis of a fossilized fish shoal suggests that animals may have evolved coordinated group movement around 50 million years ago.
- Agriculture
The U.S. is still using many pesticides that are banned in other countries
In 2016, the United States used millions of kilograms of pesticides that are banned or being phased out in the European Union, Brazil and China.
- Space
For an asteroid, Ryugu has surprisingly little dust on its surface
Ryugu lacks the dust that some other space rocks have. The near-Earth asteroid may hide the fine debris inside porous rocks or eject it into space.
- Humans
Stone tools may place some of the first Americans in Idaho 16,500 years ago
Newly discovered stone artifacts support the idea that North America’s first settlers traveled down the Pacific coast and then turned eastward.
- Anthropology
Ancient Maya warfare flared up surprisingly early
Extreme conflicts broke out well before the decline of the Maya civilization, researchers say.
- Earth
Greenland may have another massive crater hiding under its ice
There may be yet another large crater buried beneath Greenland’s ice sheet. But it’s probably not related to the first one found last year.
- Planetary Science
Mars’ lake may need an underground volcano to exist
If a lake under Martian ice is real, there must be a subsurface magma pool to keep conditions warm enough for water to remain liquid, scientists say.
- Science & Society
How we reported a controversial story about the day the dinosaurs died
Here’s how we covered the story of new fossils found in the Tanis site in North Dakota, including the story’s more controversial elements.
