Word: knowns
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Dates: during 1990-1999
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...always falling on the earth, the laws of physics decree that the planet has to radiate the same amount of energy back into space to keep the books balanced. The earth does this by sending infrared radiation out through the atmosphere, where an array of molecules (the best known is carbon dioxide) form a kind of blanket, holding outgoing radiation for a while and warming the surface. The molecules are similar to the glass in a greenhouse, which is why the warming process is called the greenhouse effect...
...Known for the novels and screenplays that have spawned such movies as Jaws and the TV series Peter Benchley's Amazon, the author has narrated dozens of films on ocean conservation. Join TIME.com to talk to Peter Benchley on Thursday, Nov. 4, at 8 p.m. E.T. at chat.yahoo.com/time
Dermatologists have long known that inactive hair follicles aren't dead; they're just catatonic. Drugs like Rogaine can rouse some of them to boost hairiness by a few percentage points. But true hair regrowth has so far eluded the experts...
...experiment at Cornell's Weill Medical College, though, may hint at a real baldness cure. The key is a gene known as SHH. In embryos SHH controls brain development, but in mature animals--including humans--it governs natural on-off cycles of hair growth. And sure enough, when scientists inserted SHH into mouse hair follicles (using a common cold virus as their splicing tool), the dozing follicles woke up and performed...
...point the way toward a cold cure though. Scientists at the University of Ghent, in Belgium, have found a protein called M2 that seems to be present in virtually every flu strain known to man. Using that knowledge, they have made a vaccine that they think could protect against all flus--old, new and those not yet in existence...