Sentences with phrase «earth by meteorite»

«This research therefore outlines a plausible mechanism by which molecules present in interstellar space, brought to earth by meteorite strikes, could potentially be converted into 2 - deoxy - D - ribose, a molecule vital for all living systems.»

Life - Producing Phosphorus Carried to Earth by Meteorites June 4, 2013 — Scientists may not know for certain whether life exists in outer space, but new research from a team of scientists led by a University of South Florida astrobiologist now shows that one key element that produced life on Earth was carried here on meteorites.

Not exact matches

Precious Metals the Result of Meteorite Bombardment, Rock Analysis Finds Sep. 9, 2011 — Ultra high precision analyses of some of the oldest rock samples on Earth by researchers at the University of Bristol provides clear evidence that the planet's accessible reserves of precious metals are the result of a bombardment of meteorites more than 200 million years after Earth was formed.

June 4, 2013 — Scientists may not know for certain whether life exists in outer space, but new research from a team of scientists led by a University of South Florida astrobiologist now shows that one key element that produced life on Earth was carried here on meteorites.

Sep. 9, 2011 — Ultra high precision analyses of some of the oldest rock samples on Earth by researchers at the University of Bristol provides clear evidence that the planet's accessible reserves of precious metals are the result of a bombardment of meteorites more than 200 million years after Earth was formed.

He started by mocking the inane tabloid attacks he's been subjected to, from Chairman Mao bicycles to his supposed support for a meteorite to destroy the earth.

But, if organisms could somehow survive exposure to those conditions, it might mean that life on Earth could have come from elsewhere in the solar system, perhaps ferried by a meteorite.

The meteorite, dubbed Northwest Africa (NWA) 7034, contains a concentration of water by weight about ten times higher than in any of the other 100 or so known Martian meteorites — those rare rocks that get ejected from the Martian surface into space when an asteroid hits the planet, and eventually find their way to Earth.

The team speculate that a meteorite impact, moonquake, or pressure created by gravitational tugs from the Earth could have triggered a minor ceiling collapse in the tube.

Wood deduced how much gold ought to be present in Earth's crust by comparing the crust's composition to that of meteorites similar to the planetesimals.

Similar material could have traveled to Earth from space by way of a meteorite and helped pave the way for the beginning of life.

Most researchers believe that the origin of life depended heavily on chemicals delivered to Earth by comets and meteorites.

Was this weak spot caused by a gigantic meteorite that effectively smashed a hole in the Earth's lithosphere?

For the new study, the researchers used an extremely precise laser - based method to measure oxygen isotopes in a range of Earth rocks, meteorites and three lunar samples gathered by the Apollo astronauts.

The glass itself, one large polished piece of which has a prominent place in a necklace that belonged to Egyptian pharaoh Tutankhamen, has been dated to 28.5 million years and has long been thought to be the result of a meteorite impact or an airburst caused by a comet breaking up in Earth's atmosphere.

Current thinking is that these tiny diamonds can form in three ways: enormous pressure shockwaves from high - energy collisions between the meteorite «parent body» and other space objects; deposition by chemical vapor; or, finally, the «normal» static pressure inside the parent body, like most diamonds on Earth.

Straight away, the Hypatia mineral matrix (represented by fruitcake dough), looks nothing like that of any known meteorites, the rocks that fall from space onto Earth every now and then.

Years of past analyses by Earth - bound scientists of gas bubbles trapped inside Martian meteorites had already narrowed the Martian argon ratio to between 3.6 and 4.5 (that is 3.6 to 4.5 atoms of Argon - 36 to every one Argon - 38) with the supposed Martian «atmospheric» value near four.

Discovered in 1984 in Allan Hills, Antarctica, researchers believe that meteorite ALH84001 struck Earth some 3.5 to four billion years ago after being kicked up from the Martian surface and into space by the impact of another meteorite.

It would even lend support to the recent and bizarre hypothesis that Earth might have been seeded, billions of years ago, by microbe - bearing Martian meteorites.

They simulated a meteorite impact on early Earth by firing a high - power laser at samples of formamide — a liquid that would have existed on our primordial planet.

This addition to the inventory of organic compounds produced in extraterrestrial environments furthers the discourse of whether their delivery to the early Earth by comets and meteorites might have aided the molecular evolution that preceded the origins of life.

The researchers were looking at rocks from the Ries crater (inset) of southern Germany, a 24 - kilometer - wide depression formed about 14.6 million years ago by a meteorite crashing into Earth with the force of 1.8 million Hiroshima bombs.

«If you think about a mass extinction caused by catastrophic event such as a meteorite impacting Earth, you might imagine all species are equally likely to die,» Blonder said.

A measurement by the SAM instrument, shown dismounted from the Curiosity Rover, has confirmed that some meteorites found on Earth originated from Mars.

If there is life on any Earth - type planet orbiting youthful Vega, it is likely to be primitive single - cell, anaerobic (non-oxygen producing) bacteria under constant bombardment by meteorites and comets as Earth was for the first billion years.

If there is life on any Earth - type planet orbiting youthful Altair, it is likely to be primitive single - cell, anaerobic (non-oxygen producing) bacteria under constant bombardment by meteorites and comets as Earth was for the first billion years.

Eventually, they landed on a second asteroid, where they were buried by other rock — until that asteroid too shed them in the form of the meteorites that carried them to Earth.

Another NASA research group, led by Kathie Thomas - Keprta of NASA's Johnson Space Center, report in the same issue of PNAS that the magnetite crystals inside the meteorite are similar to those formed by «modern» magnetotactic bacteria now living on Earth.

Even if it is possible for an Earth - type planet to orbit youthful Sirius A and develop life, it is likely to be primitive single - cell, anaerobic bacteria under constant bombardment by meteorites and comets as Earth was for the first billion years.

The Cool Stars 18 Public Lecture is sponsored by The Barringer Crater Company, owners since 1903 of The Barringer Meteorite Crater more commonly known as Meteor Crater, Earth's first proven and best preserved impact site.

White said this bolsters the argument that the features are Martian, and not created by contamination, though she noted it would be difficult to prove that any meteorite on Earth contains traces of alien life.

A discovery by a NASA scientist of sugar and several related organic compounds in two carbonaceous meteorites provides the first evidence that another fundamental building block of life on Earth may have come from outer space.

If there is life on any Earth - type planet orbiting youthful EV Lac, it is likely to be primitive single - cell, anaerobic (non-oxygen producing) bacteria under constant bombardment by meteorites and comets as Earth was for the first billion years and massive stellar flares.

«Some different microbial species, derived from samples of [two] meteorites, have been cultured, cloned and classified by 16S rDNA typing and found to be not essentially different from present day organisms [here on Earth]; they also appear sensitive to growth inhibition by specific antibiotics.»

For most dating requirements it has been superseded by uranium — lead dating (U — Pb dating), but in certain specialized situations (such as dating meteorites and the age of the Earth) it is more important than U — Pb dating.

After a meteorite crashes to Earth awakening the extraterrestrial creature within, a young woman is abducted by an alien «Gray» to aide in hunting down and destroying the creature before it can reach a second meteorite that fell to Earth decades earlier, waiting to unleash a deadly infestation of the planet.

This module includes the following: * A check list for students, parents and teachers to ensure that students understand all the content by the time they reach the end of the module; * A list of important terms used in this section * Descriptions of different celestial bodies (planets, stars, moons, comets, asteroids, meteoroids, meteors, meteorites) * Opportunities for student engagement - place for students to write their thoughts / answers in spaces provided (individual as well as group work) * Simple explanations on the Earth's rotation, day and night, years and seasons, equinoxes and solstices.

NASA astronauts discovered that real Moon craters were almost all created by meteorites while their namesakes on Earth were created by volcanic eruptions.

Among an ever expanding (and as Karen Barad might say, «entangled») list, I am inspired by the complex and contradictory city I live in (the city of Chicago) and the incredible community of hard working, sincere, talented artists who I am surround by and have the privilege of working alongside and in collaboration with every day (too many and to diverse to name individually here) / / by mentors A. Laurie Palmer and Claire Pentecost and Anne Wilson and Ben Nicholson / / by Simon Starling and Andrea Zittel and Mark Dion and Sarah Sze and Phoebe Wasburn and Mierele Laderman Ukeles and Joseph Beuys and Eva Hesse and Hans Haacke and Robert Smithson / / by writers and philosophers Karen Barad and Jane Bennett and Rebecca Solnit and Italo Calvino and Steward Brand and the contributors to The Whole Earth Catalog (of which my father gave me his copies) and Ken Issacs and Carl Sagan and Neil deGrasse Tyson and William Cronon and Bruno Latour and Deluze and Guttari and Jack Burnham / / by ideas of radical intimacy and transformation and ephemerality and experimentation and growth and agency and mobility and nomadicism and balance and maintenance and survival and change and subjectivity and hylozoism and living structures / / by mycelium and soil and terracotta and honey and mead and wild yeast and beeswax and fat and felt and salt and sulfur and bismuth and meteorites and microbes and algae and oil and carbon and tar and water and lightening and electricity and oak and maple / / by exploration and navigation and «the Age of Wonder» and the Mir Space Station and the Deep Tunnel Project / / by Lake Michigan and the Chicago River and waterways and canals and oceans and puddles... to name a few.

Let me refer you to William M. Connelly's blogpost of Nov 27, 2008 in which he stated: «And it is not true that The trajectory of current melting plummets through the graphs like a meteorite falling to earth — as we all know, there was marginally more ice this year than last — and if Monbiot, PIRC, or anyone from the Naval Postgraduate School in Monterey, California, or indeed anyone else is stupid enough to believe that all the late - summer ice will be gone by 2013 (or within «within three to seven years»), I've got money that says otherwise: wan na bet?»

Could some be introduced by meteorite / astroid impacts, volcanic activity, or different emission of radon gas from Earth's interior?

If in the 2040s the Earth gets hit by a meteorite shower and dramatically cools, or if humanity has installed mirrors in space to prevent the warming, then the above scenario was not wrong (the calculations may have been perfectly accurate).

In the Proceedings of the National Academy of Sciences, the international team lays out its theory that the mass extinctions in North America were caused by one or more extraterrestrial objects — comets or meteorites — that exploded over the Earth or slammed into it, triggering catastrophic climate change.

The impact of the meteorite that wiped out the dinosaurs released vast amounts of CO2 from vaporising carbonate - rich rocks, pushing atmospheric CO2 levels up to approx 2,300 ppm resulting in a climatic forcing of +12 W - m -LRB--) 2 that would have been sufficient to warm the Earth's surface by 7.5 °C, in the absence of counter forcing by sulfate aerosols.

Many of the mechanisms are like that — the tides, the direct inductive heating, the heating caused by the days influx of falling meteorites — which incidentally is far greater than the rate of heat loss through outgassing, as meteoric dust and matter infalls at an average rate of at least millimeters per decade, from my own direct measurements — they have «impressively» large amounts of annual energy associated with them, right up to where you divide by the surface area of the earth and the number of seconds in a year.

Reconstructing cosmic ray fluxes The starting point of [Shaviv and Veizer, 2003] is a reconstruction of cosmic ray fluxes over the past 1,000 m.y. based on 50 iron meteorites and a simple model estimating cosmic ray flux (CRF) induced by the Earth's passage through Galactic spiral arms -LRB-[Shaviv, 2002; Shaviv, 2003]-RRB-.

Who was the «journalist» who asked if global warming meant it was more likely that the earth would be hit by a meteorite?