11/30/10
vaata veel
Mida tooks enesega neljakraadine soojenemine?
Jessica Marshall tutvustab Discovery Channeli veebisaidil teadustöid, mis annavad aimu sest, mis meist kõigist saab, kui peaks käivituma must, ent paraku aina tõepärasemaks muutuv kliimastsenaarium, ning Maa kliima soojeneb käesoleva sajandi lõpuks keskmiselt 4C võrra.
A study by Richard Betts at the Met Office Hadley Centre in Devon, United Kingdom suggests that a four-degree temperature rise relative to pre-industrial levels could happen by the 2070s, if emissions are high, if the temperature response to those emissions is high, and if the feedback cycles to those emissions are high. "Everything I’m talking about is within what's thought to be scientifically credible," he said. If we reach four degrees higher by the 2070s, we would put us on track for an almost seven-degree increase by the end of the century, he said. The projections are too uncertain to say exactly what trajectory we are on, Betts said.
A study by Richard Betts at the Met Office Hadley Centre in Devon, United Kingdom suggests that a four-degree temperature rise relative to pre-industrial levels could happen by the 2070s, if emissions are high, if the temperature response to those emissions is high, and if the feedback cycles to those emissions are high. "Everything I’m talking about is within what's thought to be scientifically credible," he said. If we reach four degrees higher by the 2070s, we would put us on track for an almost seven-degree increase by the end of the century, he said. The projections are too uncertain to say exactly what trajectory we are on, Betts said.
11/29/10
Ensüüm telomeraas aeglustab vananemist
Ewn Callaway tutvustab Nature veebilehel teadustööd, mis vihjab reaalsele võimalusele aeglustada olulisel määral vananemisprotsesse.
Mice engineered to lack the enzyme, called telomerase, become prematurely decrepit. But they bounced back to health when the enzyme was replaced. The finding, published online today in Nature, hints that some disorders characterized by early ageing could be treated by boosting telomerase activity. It also offers the possibility that normal human ageing could be slowed by reawakening the enzyme in cells where it has stopped working, says Ronald DePinho, a cancer geneticist at the Dana-Farber Cancer Institute and Harvard Medical School in Boston, Massachusetts, who led the new study.
Mice engineered to lack the enzyme, called telomerase, become prematurely decrepit. But they bounced back to health when the enzyme was replaced. The finding, published online today in Nature, hints that some disorders characterized by early ageing could be treated by boosting telomerase activity. It also offers the possibility that normal human ageing could be slowed by reawakening the enzyme in cells where it has stopped working, says Ronald DePinho, a cancer geneticist at the Dana-Farber Cancer Institute and Harvard Medical School in Boston, Massachusetts, who led the new study.
11/26/10
New York Timesi raamatute TOP 100
New York Times on taaskord välja valinud lõppeva aasta 100 parimat raamatut, mis esiletõstmist ja jõulukingiks ostmist väärivad.
Johan Hari: kliimasoojenemine on endiselt ülioluline teema
Johan Hari tuletab Independentis meelde, et kuigi kliimasoojenemine ei ole enam ammu näiliselt seksikas ja põnev teema, tuleks sellesse siiski suhtuda väga tõsiselt, sest see puudutab otseselt meie ja meie laste tulevikku.
Before the Great Crash of 2008, the people who warned about the injection of huge destabilizing risk into our financial system seemed like arcane, anal bores. Now we all sit in the rubble and wish we had listened. The great ecological crash will be worse, because nature doesn’t do bailouts.
Before the Great Crash of 2008, the people who warned about the injection of huge destabilizing risk into our financial system seemed like arcane, anal bores. Now we all sit in the rubble and wish we had listened. The great ecological crash will be worse, because nature doesn’t do bailouts.
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