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19774
I haven’t seen any reference to the similarity between the “morphing” wing in this article and the “warping” wing that the Wright brothers used on their gliders and powered aircraft. It seems we’ve come full circle in our quest to emulate the flight of birds. Paul BakerBrowns Valley, Calif.
- Earth
Irony on High: Global warming cools, thins upper atmosphere
Increasing concentrations of carbon dioxide and other greenhouse gases in the air, which cause temperatures at Earth’s surface to warm, will turn the upper layers of the atmosphere cooler and thinner in coming decades, new research suggests. This counterintuitive phenomenon, first predicted in the late 1980s and recently inferred from satellite data, will probably lead […]
- Planetary Science
The Big Picture: Cassini spies Titan’s tall mountains
A spacecraft has discovered the largest mountains known on Titan, Saturn's smog-shrouded moon.
