"The early Earth could well have been seeded with the chemical building blocks you need for life to start, " said Dr. Smith.
It has long been thought that the lunar body resulted from an impact between the early Earth and another planet-sized object 4.5 billion years ago.
The third sub-question of how life managed to get going at all in the hostile arena of the early Earth, was neatly addressed by Charles Cockell, of Britain's Open University.
That project will seek to return samples of organic materials from an asteroid to help scientists understand how the building blocks for life may have been seeded on the early Earth.
Matija Cuk, from the Seti Institute, and colleagues ran new simulations in which the early Earth was rotating on its axis in just a few hours prior to the impact - compared to the present 24 hours.
For me, this self-denial approach would be more in keeping with your old, or early, Earth Day.
Today, US military weather satellites return daily data on the state of the sea-ice at both poles, but the NSIDC team is keen to retrieve as much information as possible from the early, experimental Nasa Earth-observers.
BBC: Earliest satellite maps of Antarctic and Arctic sea-ice
But a range of genetic studies that look for fairly regular changes in genetic makeup suggested that the group arose as long as 100 million years ago, with mammals such as early rodents sharing the Earth with the dinosaurs.
We believe that in its early history - remember, Earth and Mars, the solar system, 4.6 billion years old. 4.6 billion years old the age of Earth and Mars and the solar system.
The test was designed to simulate the type of impact that would have been frequent during Earth's early history, some four billion years ago, when rocky, icy debris in our Solar System accumulated to form planets.
Though it has been estimated that in Earth's early history only a few percent of comets or asteroids arrived at low enough angles, the bombardment would have been heavy enough to deliver a significant amount of intact organic material and water, Blank said.
Without intervention, officials say, the satellite would have fallen to Earth on its own in early March.
The band Earth got its start in the early '90s, specializing in the drones of experimental feedback like Black Sabbath with fewer notes and no drummer.
After a stirring early start, Tebow and the Broncos fell to earth against the resilient, adaptable Patriots.
My company, Moon Express, is focused on the next stage of commercial space beyond low Earth orbit, and is already developing early precursor robotic missions in partnership with NASA to explore the Moon and learn how to develop its resources for the benefit of life on Earth.
FORBES: The Moon is a Natural Platform for Asteroid Mining, Detection and Deflection
With the royal-wedding circus over, London is refocusing on its more down-to-earth pleasures, making the sunny days of early summer a strategic moment to pop over.
Although there is no early prospect of a global shortage of any of the earth's resources, a larger population does change the earth and its environment, removing forests, cultivating land or building on it, and driving out other species, and that is itself a cause for legitimate concern.
Shalene Flanagan set an American record earlier this year, and interestingly enough, in the early '70s, her mother was the first woman on Earth to run under two hours and 50 minutes in a marathon.
Since the very first planets outside our solar system were discovered in the early 1990s, the hope has been to find an "Earth twin" - a planet like ours, orbiting a star like ours, at a distance like ours.
The unmanned Dragon spacecraft cast off from the International Space Station early Thursday morning and survived a fiery re-entry through Earth's atmosphere to make an apparently flawless splashdown in the Pacific Ocean off the coast of Baja California.
MSN: SpaceX showered with praise for success of Dragon mission
This supports models where the moon is derived from Earth materials that were ejected during a giant impact event early in solar system history.
Late Friday, NASA put out a statement indicating that the satellite's orbit was taking it as close as 90 miles to the Earth and re-entry was expected around midnight or early Saturday Eastern Daylight Time.
So big name architects have been falling over themselves to get this gig, probably the highest profile project on earth for the next two years or so (groundbreaking anticipated early 2012).
FORBES: My Brilliant Solution To Brazil's Olympic Golf Course Debate
Early radio audiences panicked when Orson Welles dramatized a novel about Martians landing on earth.
Argentina had held the upper hand in the early exchanges, but suddenly fear ran through the South American ranks like an earth tremor every time Owen took possession.
His early work in South Africa and Namibia studying termite mounds, prodigious natural chimneys of earth out of all proportion in size to the small termites that build them, did not turn him into a Darwin skeptic, by any means, but it did prod him to realize how important the role of environment is to the survival and flourishing of a species.
For a month in early 2000 Cisco Systems, the Internet router king, became the most valuable company on Earth.
At some point Chelsea will come back down to earth slightly, but they certainly look like the team to beat in the early going.
FORBES: Premier League Leaders and Laggards Through September
If players survive the early game, there are a number of objectives to pursue, including digging deep into the earth for valuable resources that allow additional advancement, increasing village happiness to attract immigrants, outfitting citizens and soldiers, and even procuring heroes that can gain experience and level up as they hunt down the dangers in the depths.
According to a report released by the Wood Mackenzie firm in early January, Eagle Ford is now the largest oil and gas development on the face of the earth based on total capital expenditures.
应用推荐