Archive for 'Comets'
Scientist Smackdown: No Proof That a Comet Killed the Mammoths?
Posted on 31. Aug, 2010 by Andrew Moseman.
When it comes to explaining why the woolly mammoths died out, “death from above” could be down for the count. Nearly 13,000 years ago, North American megafauna like the mammoths and giant sloths—and even human groups like the people of the Clovis culture—disappeared as the climate entered a cold snap. As DISCOVER has noted before, there’s [...]
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Perseid Meteor Shower: Where & When to Catch the Sky Show
Posted on 11. Aug, 2010 by Andrew Moseman.
This week brings the annual return of the Perseids, one of the most stunning meteor showers of the year, visible from just about anywhere. WHAT: The height of the Perseid shower comes every August, because that’s the time our planet passes through a certain debris path. The Perseids are created by the tiny remnants left behind by [...]
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Study: A Death Star Named Nemisis Isn’t to Blame for Mass Extinctions
Posted on 13. Jul, 2010 by Joseph Calamia.
In the 1980s, fossil record research showed a curious cycle: Every 27 million years, Earth hosted a mass extinction. Some scientists suggested that a dim star dubbed Nemesis was in a deadly dance with our sun, periodically kicking comets out of the distant Oort Cloud to shower our planet with destruction. Morbidly fascinating as it [...]
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Asteroid Photo Session: Rosetta Spacecraft Snaps Pics of Battered Lutetia
Posted on 12. Jul, 2010 by Joseph Calamia.
On Saturday, the European Space Agency’s Rosetta probe took the world’s closest pictures of the 80- by 50-mile-wide asteroid known as 21 Lutetia. Though the Lutetia visit is just a stop on the way to Rosetta’s real destination–a 2014 visit to the comet 67P/Churyumov-Gerasimenko–Saturday’s pictures document the closest visit to this big asteroid, the largest [...]
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Scientist Smackdown: Evidence of a Mammoth-Killing Comet, or Bug Poop?
Posted on 23. Jun, 2010 by Joseph Calamia.
It makes for a good movie: 12,900 years ago, a comet slams into Earth, igniting forest fires across North America and sending the planet into a thousand cold years, killing off mammoths, giant sloths, and a bunch of other big mammals. But scientists have fiercely debated whether such a movie, about the cause of the [...]
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Science resources
Top 10 science papers
- Evolutionary hidden information detection by granulation-based fitness approximation • ArticleApplied Soft Computing, Volume 10, Issue 3, June 2010, Pages 719-729 | Davarynejad, M.; Ahn, C.W.; Vrancken, J.; van den Berg, J.; Coello Coello, C.A. […]
- The Hallmarks of Cancer • Review articleCell, Volume 100, Issue 1, January 2000, Pages 57-70 | Hanahan, D.; Weinberg, R.A. […]
- Transcriptome-wide Identification of RNA-Binding Protein and MicroRNA Target Sites by PAR-CLIP • ArticleCell, Volume 141, Issue 1, April 2010, Pages 129-141 | Hafner, M.; Landthaler, M.; Burger, L.; Khorshid, M.; Hausser, J.; Berninger, P.; Rothballer, A.; Ascano, M.; Jungkamp, A.C.; Munschauer, M.; Ulrich, A.; Wardle, G.S.; Dewell, S.; Zavolan, M.; Tuschl, T. […]
- A Chromatin-Mediated Reversible Drug-Tolerant State in Cancer Cell Subpopulations • ArticleCell, Volume 141, Issue 1, April 2010, Pages 69-80 | Sharma, S.V.; Lee, D.Y.; Li, B.; Quinlan, M.P.; Takahashi, F.; Maheswaran, S.; McDermott, U.; Azizian, N.; Zou, L.; Fischbach, M.A.; Wong, K.K.; Brandstetter, K.; Wittner, B.; Ramaswamy, S.; Classon, M.; Settleman, J. […]
- Immunity, Inflammation, and Cancer • Review articleCell, Volume 140, Issue 6, March 2010, Pages 883-899 | Grivennikov, S.I.; Greten, F.R.; Karin, M. […]
- Induction of Pluripotent Stem Cells from Mouse Embryonic and Adult Fibroblast Cultures by Defined Factors • ArticleCell, Volume 126, Issue 4, August 2006, Pages 663-676 | Takahashi, K.; Yamanaka, S. […]
- The Inflammasomes • Review articleCell, Volume 140, Issue 6, March 2010, Pages 821-832 | Schroder, K.; Tschopp, J. […]
- Mitochondria Supply Membranes for Autophagosome Biogenesis during Starvation • ArticleCell, Volume 141, Issue 4, May 2010, Pages 656-667 | Hailey, D.W.; Rambold, A.S.; Satpute-Krishnan, P.; Mitra, K.; Sougrat, R.; Kim, P.K.; Lippincott-Schwartz, J. […]
- Pattern Recognition Receptors and Inflammation • Review articleCell, Volume 140, Issue 6, March 2010, Pages 805-820 | Takeuchi, O.; Akira, S. […]
- Reconstitution of the RIG-I Pathway Reveals a Signaling Role of Unanchored Polyubiquitin Chains in Innate Immunity • ArticleCell, Volume 141, Issue 2, April 2010, Pages 315-330 | Zeng, W.; Sun, L.; Jiang, X.; Chen, X.; Hou, F.; Adhikari, A.; Xu, M.; Chen, Z.J. […]
