Modern commercial aircraft flying at high altitudes create longer-lived planet-warming contrails than older aircraft, a new study has found.
Environment
59 minutes ago
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21
Four decades ago, fragile falcon eggs were saved from certain death by Ken Yager and a small team of expert climbers from a nest on Yosemite's El Capitan sheer granite wall, as protective parents dive-bombed from the sky.
Plants & Animals
Aug 1, 2024
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186
Mountain hikes are invigorating. Crisp air and clear views can refresh the soul, but thin air presents an additional challenge for high-altitude birds. "All else being equal, bird wings produce less lift in low density air," ...
Plants & Animals
Aug 1, 2024
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15
If the bedrock in the Alps no longer remains permanently frozen, rockfalls may occur more frequently. By measuring electrical resistivity in the ground, researchers can now better understand why this happens.
Earth Sciences
Jul 30, 2024
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1
This week, we reported on new epigenetic findings in memory formation as well as a dramatic spike in micromobility-related head injuries, so there's a whole lot of head-related science on the front burner these days. There ...
Crave that cup of coffee in the morning? Globally, consumers drink more than 2.2 billion cups daily. Someone grows all that joe: More than 100 million farmers worldwide produce coffee.
Plants & Animals
Jul 25, 2024
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133
The melting of one of North America's largest icefields has accelerated and could soon reach an irreversible tipping point. That's the conclusion of new research colleagues and I have published on the Juneau Icefield, which ...
Environment
Jul 6, 2024
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359
On Everest's sacred slopes, climate change is thinning snow and ice, increasingly exposing the bodies of hundreds of mountaineers who died chasing their dream to summit the world's highest mountain.
Environment
Jun 27, 2024
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103
Located in southwest China, the Hengduan Mountains (HDM) are one of the world's biodiversity hotspots, characterized by diverse topography and exceptionally high mountain biodiversity. Rorippa elata (Brassicaceae) is an endemic ...
Plants & Animals
Jun 17, 2024
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0
Carbonaceous aerosols not only alter the atmospheric radiation budget, but also accelerate glacier melt by reducing the albedo of ice and snow surfaces. However, due to the heterogeneity of carbonaceous aerosols, the identification ...
Earth Sciences
Jun 11, 2024
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0
Altitude or height is defined based on the context in which it is used (aviation, geometry, geographical survey, sport, and more). As a general definition, altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The reference datum also often varies according to the context. Although the term altitude is commonly used to mean the height above sea level of a location, in geography the term elevation is often preferred for this usage.
Vertical distance measurements in the "down" direction are commonly referred to as depth.
This text uses material from Wikipedia, licensed under CC BY-SA
