They do this by chewing through tree trunks with their huge teeth and building dams in streams, flooding large areas to create beaver ponds. ... the weight of the water pushes down on the dam ...

2019年7月5日 · Beavers are described as “ecosystem engineers” because their dam-building work has such a huge effect on habitats. Both the Eurasian beaver and the American beaver were almost driven extinct ...

1991年1月26日 · At first sight, Tehri is a wonderful place to build a dam: a narrow Himalayan gorge at the end of a wide trough-shaped valley that could hold 3.5 cubic kilometres of water. Indian geologists ...

New Scientist's round-up of some of the best new robots of 2024

2012年12月21日 · Himalayan dam-building threatens endemic species. By Sanjay Kumar. 21 December 2012 Dam-builder’s dream – shame about the wildlife (Image: Mark Williamson/OSF/Getty) The Himalayas, the world ...

2024年12月23日 · Around a dozen landers are aiming for touchdown on the lunar surface next year, with the goal of developing the technology necessary to build a permanent human presence there.

2022年11月22日 · Environment Why the Colorado river is drying up – and what we can do about it. The Colorado river is the lifeblood of the US Southwest, but today it is drastically depleted due to overuse ...

2017年6月15日 · Building more dams “might mitigate tomorrow’s climate change impacts for a certain group of people whilst putting others under pressure today,” she says. Journal reference: Nature ...

2025年1月16日 · Neolithic people buried hundreds of stones carved with images of the sun about 4900 years ago and they may have done it because a volcanic eruption covered the sky

2025年1月1日 · Not touching your face. Panic-buying toilet roll. Disinfecting groceries. Some of the advice and behaviour of the early days of the covid-19 pandemic can, in retrospect, seem utterly bizarre.