Reference Terms
from Wikipedia, the free encyclopedia
Impact crater
An impact crater is a circular depression on a surface, usually referring to a planet, moon, asteroid, or other celestial body, caused by a collision of a smaller body (meteor) with the surface.
Note: The above text is excerpted from the Wikipedia article "Impact crater", which has been released under the GNU Free Documentation License.
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Earth & Climate News
May 27, 2025
May 27, 2025 — Scientists, who have spent more than a decade examining the impact of artificial light at night on the world's coasts and oceans, have shown that more than one-fifth of the global ocean -- an area spanning more than 75 million sq km -- has been the ...
May 8, 2025 — A new study of the 28 most populous U.S. cities finds that all are sinking to one degree or another. The cities include not just those on the coasts, where relative sea level is a concern, but many in the interior. Furthermore, using newly granular ...
May 7, 2025 — Climate scientists reveal that millions of today's young people will live through unprecedented lifetime exposure to heatwaves, crop failures, river floods, droughts, wildfires and tropical storms under current climate policies. If global ...
May 6, 2025 — Biologists have discovered two previously unknown species of crocodiles, one living on the island of Cozumel and the other on the atoll of Banco Chinchorro, both off the Yucat n Peninsula. The findings challenge long-held assumptions about the ...
Latest Headlines
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May 27, 2025 — A pioneering method to simulate how microscopic particles move through the air could boost efforts to combat air pollution, a study ...
May 27, 2025 — A new study has found that a smartphone app that tracks household water use and alerts users to leaks or excessive consumption offers a promising tool for helping California water agencies meet ...
May 27, 2025 — Alterations to the diet of pests could impact how quickly they can adapt to ...
May 27, 2025 — When formulating climate policy, too little attention is paid to social factors and too much to technological breakthroughs and economic reasons. Because citizens are hardly heard in this process, ...
May 27, 2025 — Researchers conducted a systematic review of 99 scientific publications that compared the flora or fauna of old-growth forests, managed forests and clearcut sites in boreal Europe. The reviewed ...
May 23, 2025 — Plankton may be tiny, but they play an important role in the ocean. As the foundation of marine ecosystems, they support ocean food webs and help regulate Earth's climate by storing carbon. While lab ...
May 23, 2025 — A new study shows that monitoring and managing select bird species can provide benefits for other species within specific ...
May 26, 2025 — A gene that regulates the development of roots in vascular plants is also involved in the organ development of liverworts -- land plants so old they don't even have proper roots. The discovery ...
May 22, 2025 — Researchers have mathematically elucidated how the presence of crystals and gas bubbles in magma affects the propagation of seismic P-waves. A novel ...
May 22, 2025 — An analysis of 900 species over a 20-year period showed that biodiversity enhances ecosystem stability and helps safeguard natural communities in a changing ...