|
|
Hot Topic
Solar System
Earth
|
|
| |
|
|
A Late Birth for the Earth and Moon
|
| Topic: Earth |
06/09/10 |
| The Earth and Moon may have been formed much later than previously believed. Understanding the history and formation of the Earth is important in determining the potential for habitable worlds around distant stars. |
|
|
|
|
A Dark and Warm Early Earth
|
| Topic: Earth |
04/11/10 |
| Four billion years ago, the Sun radiated less energy than it does today. Scientists once believed that greenhouse gases must have helped the Earth stay warm during this time. However, new research shows that the large oceans may have simply absorbed more heat. |
|
|
|
|
2012 Apocalypse
|
| Topic: Earth |
10/18/09 |
| According to NASA scientist David Morrison, the widespread Internet rumor that the world will end in 2012 due to some astronomical event is a hoax. Dr. Morrison attributes the hype to 'cosmophobia' fueled by fake science websites and people trying to cash in on public lack of knowledge. |
|
|
|
|
|
Apocalipse em 2012
|
| Topic: Earth |
10/18/09 |
| De acordo com o cientista David Morrison da NASA, o rumor da internet amplamente difundido de que o mundo acabará em 2012 devido a algum evento astronômico é uma farsa. O Dr. Morrison atribui o engodo à “cosmofobia” abastecida por páginas virtuais de falsa ciência e pessoas tentando faturar com a falta de conhecimento do público. |
|
|
|
|
A Hazy View of Early Earth
|
| Topic: Earth |
10/12/09 |
| The atmosphere of the early Earth may have been filled with particulate haze, much like a smoggy day in Los Angeles. This hazy air would have affected the ancient climate and even may have influenced the origin and evolution of life. |
|
|
|
|
A Carbonyl Sulphide Blanket
|
| Topic: Earth |
09/01/09 |
| In the early days of the solar system, our Sun would not have been hot enough to keep the Earth from freezing. However, liquid water was present on the early Earth. Now, scientists believe that greenhouse gasses may have played a role in keeping Earth's oceans from freezing over completely. |
|
|
|
|
Sedimentary Rocks Speak of Sulfur
|
| Topic: Earth |
04/19/09 |
| Sedimentary rocks that are 2.4 billion years old may indicate that the early atmosphere of Earth was oxygen-rich. The strongest evidence for an oxygen-poor atmosphere on the early Earth has now been brought into question. |
|
|
|
|
Shining Earth's Mirror
|
| Topic: Earth |
04/10/09 |
| Scientists have shown that variations in earthshine – the reflection of light from the Earth's land masses and oceans – can be viewed on the dark side of the moon. The study may help astronomers search for habitable, earth-like planets around distant stars. |
|
|
|
|
|
Sick Earth
|
| Topic: Earth |
10/10/08 |
| Geologists studying mass extinctions in Earth's history have determined that the majority of extinction events were due to climate change rather than asteroid impacts. |
|
|
|
|
|
Space on Earth
|
| Topic: Earth |
01/25/07 |
| In his book, "Space on Earth," microbiologist Charles Cockell urges space scientists and environmentalists to work together for the future for humanity. |
|
|
|
|
|
