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Science


Astrophysicists report radioactive cobalt in supernova explosion

Fri, 29 Aug 2014 10:34:24 EDT

Astrophysicists have detected the formation of radioactive cobalt during a supernova explosion, lending credence to a corresponding theory of supernova explosions.


Ancient DNA Could Return Passenger Pigeons to the Sky

Fri, 29 Aug 2014 12:01:00 GMT

Genetic engineering could restore the once profuse North American bird after a century or more of extinction

-- Read more on ScientificAmerican.com


Patient Zero Believed to Be Sole Source of Ebola Outbreak

Thu, 28 Aug 2014 18:00:00 GMT

By pinpointing the virus’s source, a new report validates steps health care workers are taking to battle the disease  

-- Read more on ScientificAmerican.com


Astronomy: Radio telescopes settle controversy over distance to Pleiades

Thu, 28 Aug 2014 14:27:40 EDT

A worldwide network of radio telescopes measured the distance to the famous star cluster the Pleiades to an accuracy within 1 percent. The result resolved a controversy raised by a satellite's measurement that now is shown to be wrong. The incorrect measurement had challenged standard models of star formation and evolution.


Mensageiro Sideral: Nada como um asteroide após o outro

28 Aug 2014 05:55:00 -0300

Um grupo de astrônomos amadores brasileiros descobriu nos últimos dois meses nada menos que seis asteroides cujas órbitas os trazem perigosamente perto da Terra. Nenhum deles corre risco de colisão conosco, mas trata-se de um lembrete sinistro de que há ... Leia post completo no blog Leia mais (08/28/2014 - 05h55)


Early growth of giant galaxy, just 3 billion years after the Big Bang, revealed

Wed, 27 Aug 2014 13:15:51 EDT

The birth of massive galaxies, according to galaxy formation theories, begins with the buildup of a dense, compact core that is ablaze with the glow of millions of newly formed stars. Evidence of this early construction phase, however, has eluded astronomers — until now. Astronomers identified a dense galactic core, dubbed "Sparky," using a combination of data from several space telescopes. Hubble photographed the emerging galaxy as it looked 11 billion years ago, just 3 billion years after the birth of our universe in the big bang.


Multitasking Gene May Help Drone Operators Control Robotic Swarms

Tue, 26 Aug 2014 13:13:00 GMT

A genetic variant that keeps dopamine levels high could lead to personalized training and also benefit personnel in ERs and air traffic control towers

-- Read more on ScientificAmerican.com


Mensageiro Sideral: Lançamento do meu novo livro, "Extraterrestres"

27 Aug 2014 08:17:00 -0300

Pausa para o merchan: gostaria de convidar todos os leitores do Mensageiro Sideral para prestigiar o lançamento e noite de autógrafos do meu novo livro, Extraterrestres: Onde eles estão e como a ciência tenta encontrá-los. Vai acontecer na próxima terça-feira, ... Leia post completo no blog Leia mais (08/27/2014 - 08h17)


Maurício Tuffani: Quem ganha com a devastação em Mato Grosso

27 Aug 2014 02:11:00 -0300

Acabo de chegar a Barra do Garças, no Mato Grosso, onde o pessoal que ainda confunde desmatamento com progresso tem novo motivo para comemoração. Na semana passada, o Estado apareceu mais uma vez em posição de destaque no projeto Degrad,... Leia post completo no blog Leia mais (08/27/2014 - 02h11)


Spectacular supernova's mysteries revealed

Fri, 22 Aug 2014 08:39:33 EDT

Astronomers are delving into the mystery of what caused a spectacular supernova in a galaxy 11 million light years away, seen earlier this year. The supernova, a giant explosion of a star and the closest one to the Earth in decades, was discovered earlier this year by chance. These phenomena are extremely important to study because they provide key information about our universe, including how it is expanding and how galaxies evolve.


Is Fluoride in Private Wells Causing an IQ Decline?

Wed, 20 Aug 2014 13:00:00 GMT

Excess fluoride, which may damage both brain and bone, is leaching out of granite and into Maine's drinking water—and potentially other New England states

-- Read more on ScientificAmerican.com


Pequena ilha observa a evolução ano a ano

26 Aug 2014 01:55:00 -0300

Charles Darwin passou apenas cinco semanas nas ilhas Galápagos e os biólogos britânicos Peter e Rosemary Grant pretendiam ficar no máximo alguns anos lá. Leia mais (08/26/2014 - 01h55)


Cientistas aguardam ansiosamente rastros de cometa

26 Aug 2014 01:52:00 -0300

No início do ano passado o caçador australiano de cometas Robert H. McNaught viu algo fora de comum desde seu posto no Observatório Siding Spring. Leia mais (08/26/2014 - 01h52)


Arqueólogos acham duas cidades maias "escondidas" na selva

25 Aug 2014 01:55:00 -0300

Arqueólogos descobriram duas cidades maias "escondidas" na selva na região sudeste do México. Leia mais (08/25/2014 - 01h55)


Rubber Bullets in Missouri Clash Highlight Militarization of America’s Police

Sat, 16 Aug 2014 02:20:00 GMT

Police forces are increasingly turning to so-called nonlethal but dangerous weapons to control conflicts

-- Read more on ScientificAmerican.com