Sentences with phrase «of early earth»

Much of the sedimentary record of the atmosphere, oceans, biota, and crust of the early Earth has been obliterated by erosion, metamorphosis, and subduction.

If the planet was held up by giant tortoises or in contact with some other object (or in the case of early Earth, when there are significant extraterrestrial impact events) then this would not be the case.

[6] The cornerstone of this primary productivity is photosynthesis, which has radically altered the composition of early Earth's atmosphere, resulting in air that is 21 % oxygen.

He collaborated with many of the early earth artists, even appearing in Robert Smithson's film about Spiral Jetty, perhaps the most widely recognized example of earth art.

The Encyclopedia of Early Earth.

* Guillaume Gronoff from NASA's Langley Research Center in Hampton, Virginia, will discuss how energetic particle events from the young Sun impacted the chemistry of the early Earth's atmosphere and ignited conditions for prebiotic chemistry on early Earth and Mars.

* Jim Cleaves, the invited speaker from Earth Life Science Institute at Tokyo Institute of Technology, will discuss chemical environments of early Earth and its implications for the origin of life.

For decades, scientists believed that the atmosphere of early Earth was highly reduced, meaning that oxygen was greatly limited.

The researchers estimated that the bacteria undergoing «totally unshielded exposure» would only survive for two and a half minutes on the surface of early Earth.

Astrobiologists supported by the NASA Astrobiology Institute have assessed the effects of impacts on the crust of the early Earth.

Better understanding how signatures of life and environment are preserved will guide how and where to look for evidence for life elsewhere in the universe — directly supporting the Curiosity mission on Mars and helping set strategic goals for future explorations of solar system and studies of the early Earth.

We will present our first steps in the construction of an ecosystem model designed to be coupled with geo - climate models of early Earth and Mars.

Inside the sheltered bubble chambers, ancient bacteria might have survived the harsh conditions of early Earth, says study coauthor Martin Homann.

But cook up that soup in the water - rich conditions of the early Earth, and the result is distinctly unpalatable.

Miller had applied an electric discharge to a mixture of CH4, NH3, H2O, and H2 — believed at the time to be the atmospheric composition of early Earth.

In trying to understand the formation of the early Earth, some researchers have suggested that the planet was dry and inhospitable to life until icy comets pelted Earth and deposited water on the surface.

Titan, another of Saturn's moons, has a thick, methane - tinged atmosphere that is reminiscent of early Earth's.

Scientists hope they can confirm a leading hypothesis that Titan's composition is similar to that of early Earth.

Alien as this may seem, Titan's atmosphere — rich in nitrogen and organic compounds — may be similar to the atmosphere of early Earth.

Titan's chemistry, replete with organic molecules, may be a facsimile of the early Earth's, but stuck in a deep freeze.

Though large meteorite impacts could have temporarily warmed Mars above freezing, the planet wouldn't have had a consistently warm and wet youth similar to that of the early Earth, he says.

The study significantly narrows the possible temperature of the early Earth to 0 to 50 degrees Celsius.

«Seafloor weathering was more important for regulating temperature of the early Earth because there was less continental landmass at that time, the Earth's interior was even hotter, and the seafloor crust was spreading faster, so that was providing more crust to be weathered,» Krissansen - Totton said.

Chaput thinks it probably wasn't, if only because the chemistry of early Earth was so messy that TNA would not have arisen on its own.

This could have led to methane - ammonia greenhouse warming of early Earth and early Mars that kept the Earth from freezing.

The concept of an expanding, layered inner core could go a long way toward clarifying the history of the early Earth.

While researchers estimate accretion during late bombardment contributed less than one percent of Earth's present - day mass, giant asteroid impacts still had a profound effect on the geological evolution of early Earth.

He said: «This is a very exciting finding, which helps to fill a gap in our knowledge about the evolution of the early Earth.

So Hallis and her colleagues went looking for vestiges of the early Earth that might preserve the original hydrogen isotope ratio of the planet.

And with the right tools, scientists can mine these traces for date details and chemical composition to get a rare snapshot of early Earth.

Cold, sluggish Titan has evolved much more slowly, so the dirty orange organic chemicals that tint its surface — most likely dominated by tarry compounds called tholins — could be a deep - freeze model of early Earth.

Although it could explain many of the moon's observed properties, the giant - impact theory didn't jibe with what was known of early Earth.

Alastair Cameron, now at the University of Arizona, and William Ward, now at the Southwest Research Institute, were proposing that a giant impact could have created the angular momentum of the early Earth - moon system.

The researchers» model of early Earth is extremely simplified, he adds: Temperatures in Earth's interior were much hotter billions of years ago and the planet was geologically more «active,» with more volcanism at the surface and more churning in the mantle.

Professor Kamber added: «The intense bombardment of the early Earth had destructive effects on the planet's surface but it may also have brought up material from the planet's interior, which shaped the overall structure of the planet.»

If he is right, all drawings of Archaeopteryx flying through the daytime skies of early Earth will need to be revisited.

Chaput thinks TNA probably was not the original genetic material, though — if only because the chemistry of early Earth was so messy that TNA would not have arisen on its own.

Imagine, for example, a volcanic region on the otherwise cold surface of the early Earth.

«It is exciting that now Space agencies realize how studies of early Earth and early life evolution are relevant for the search for life beyond Earth.

The experiment was groundbreaking because it suggested that, under the perfectly natural conditions of early Earth, the building blocks of life can and will self - assemble.

There are several likely scenarios under which such molecules could have formed naturally, and once the correct amino acids are formed in these scenarios, life is not an unlikely occurance on the extremely long timeline of early earth.

Not exact matches

In B.C. especially, companies such as QLT Inc., Angiotech Pharmaceuticals and Cardiome Pharma Corp. saw their valuations soar in the early 2000s, only to come crashing to earth by the end of the decade as a result of competitive pressures, regulatory snags, strategic blunders and deals gone awry.

Truaxe, who recently changed his job title on LinkedIn to «Worker on Earth,» has control of his company's Instagram account, Jezebel reported earlier this month.

Having made hundreds of orbits around Saturn, Cassini was also able to deeply investigate other features only glimpsed from Earth or earlier probes.

The pre-eminent American science journalist, Gleick herein explores the history and effects of knowledge communication between humans, drawing a link from African talking drums and the earliest alphabets through the telegraph — once «a nervous system for the Earth» — to Wikipedia and Twitter, and the current state of information overload from which so many claim to suffer.

Earlier this year, Nestlé also placed its bets on conscious consumers with the purchase of Sweet Earth, a Californian - based maker of frozen vegan meals.

Earlier this week, data from Axiom Capital Management showed that the meteoric popularity of the Pokémon Go mobile game plateaued in mid-July — only two weeks after its earth - shattering debut — and has declined steadily since then.

I often say if you're willing to go into debt for $ 100,000 - 150,000 to get an MBA and have two years of your life with no work experience, why on Earth wouldn't you just join the most ambitious early - stage startup you know and work for a paltry salary to get the experience?

Still in his early thirties, Chris is on the verge of completing a tour of every country on earth - he's already visited more than 175 nations - and yet he's never held a «real job» or earned a regular paycheck.

An earlier version of this article misstated the last time a spacecraft brought moon rocks back to Earth.