Sentences with phrase «early earth history»

From early Earth history, the continental crust (Earth's thick solid outer skin that we live on) has accumulated mass from the underlying hot mantle.

At some point in early earth history, the entire globe was covered by water.

Cells formed from four basic ingredients... methane, ammonia, hydrogen and water... all of which were in abundance in early earth history.

Not exact matches

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.

At first sight, beings and their destinies might seem to us to be scattered haphazard or at least in an arbitrary fashion over the face of the earth; we could very easily suppose that each of us might equally well have been born earlier or later, at this place or that, happier or more ill - starred, as though the universe from the beginning to end of its history formed in space - time a sort of vast flower - bed in which the flowers could be changed about at the whim of the gardener.

The «Our History» page on the site notes «The modern age of the Flat Earth Society dates back to the early 1800s, when it was founded by Samuel Birley Rowbotham, an English inventor.

EVOLUTION: the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.

He reminds us that science is still ignorant of the chemical pathways that wonderfully allowed the inert chemicals of the earth's early history to form the more complex chemicals needed by even the simplest living organisms.

Motivation for this new type of person will be drawn from the theology we discussed earlier, in which God is seen as caring for all, Jesus is a brother to all, the spirit is present universally, the earth is our common mother, and society and history are where we can meet God in service to others.

Ruether's many interests — liberation in general, ecumenical relations, liturgy, racism, language, ethics, history, Christology, sexism — have been evident in such earlier works as New Woman / New Earth (1975), but in Gaia and God the connections are worked out systematically.

All seventh graders might study early American History or Earth Science.

Inspired by a 2012 paper that proposed a correlation between such hotspots and the velocity of seismic waves moving through Earth's interior, UC Santa Barbara geochemist Matthew Jackson teamed with the authors of the original paper — Thorsten Becker of the University of Texas at Austin and Jasper Konter of the University of Hawaii — to show that only the hottest hotspots with the slowest wave velocity draw from the primitive reservoir formed early in the planet's history.

While space rocks hurtling in from space threaten to deal modern life a mortal blow, meteorite impacts during Earth's early history may have played a pivotal role in kick - starting life on the planet.

Comets and asteroids are thought to have bombarded the Earth early in its history, and the new discovery suggests they carried amino acids with them.

Such craters provide a record of the solar system's early history; a similar record on Earth has long since been obscured by plate tectonics, erosion and other processes.

Some geologists, however, think it is too early in our species's history to declare human dominance over the Earth.

The ETH Professor of Geophysics uses this metaphor to address plate tectonics and the early history of the Earth.

«This shows a diverse variety of life existed in fresh water, on land, very early in Earth's history,» says Professor Van Kranendonk, Director of the Australian Centre for Astrobiology and head of the UNSW school of Biological, Earth and Environmental Sciences.

Few reliable clues exist as to the early history of Earth's atmosphere and rocky surface because geologic activity has erased detailed evidence over time.

Now the Big Bang from one millisecond onward is as well established as anything about the early history of Earth.»

The moon is thought to have formed from a disc of debris left when a giant object hit the Earth 4.5 billion years ago, very early in Earth's history.

Evidence of Earth's earliest geologic history is scant, thanks to the constant recycling of our planet's surface.

Mars was wetter very early in its history, but the probability that it was ever a blue planet like the Earth is, I think, remote.

Scientists believe there are earlier periods in Earth's history with comparably high levels of the gas.

Nesbitt added that it's even possible that life itself may have originated inside microscopic liquid particles formed early in Earth's history.

If that's correct, the early Earth was riven by earthquakes far more violent than any in human history.

Did most of the continental crust emerge early in the earth's history, or was much of it added later by tectonic processes?

Early on, it went through the same kind of history that Earth and the other rocky planets went through, says Zellner.

The scientists who studied the wellconstructed a geologic history showing that the shale could have hostedbacteria as early as 160 million years ago — before flowering plantsfirst began growing on Earth.

Geologists from Trinity College Dublin have rewritten the evolutionary history books by finding that oxygen - producing life forms were present on Earth some 3 billion years ago — a full 60 million years earlier than previously thought.

The moon is a bonanza for scientists, Kring says, because it offers crucial insights for understanding the origins and evolution of Earth and other planets: how they formed from the accretion and differentiation of smaller bodies; how they were bombarded by impacts early in their histories; and even how some of them migrated in their orbits around the sun.

New work from a team including Carnegie's Mark Heinnickel, Wenqiang Yang, and Arthur Grossman identified a protein needed for assembling the photosynthetic apparatus that may help us understand the history of photosynthesis back in the early days of life on Earth, a time when oxygen was not abundant in the atmosphere.

If the crystal could form so early in Earth's history, the planet's surface must have cooled and hardened considerably faster than researchers had suspected.

The Moon is thought to have formed from a disc of debris left when a giant object hit Earth 4.5 billion years ago, very early in Earth's history.

Rotating independently of the planet, turning at a different speed within a fluid outer core, this solid, satellite - size sphere holds clues to understanding Earth's earliest history and perhaps even life on the planet.

A team of biogeochemists at the University of California, Riverside, give us a nontraditional way of thinking about the earliest accumulation of oxygen in the atmosphere, arguably the most important biological event in Earth history.

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

Photosynthesis evolved early in Earth's history.

As photosynthesis favours the lighter isotope, carbon 12, over the heavier carbon 13, this «light» ratio finding suggests that organic material from biological sources may have been more abundant in diamond - forming zones early in the Earth's history than we find today,» explained Suzette Timmerman, lead author on the study.

«We believe that this is what gave rise to a peptide - RNA world early in Earth's history,» Carter said.

The results, published July 30 in Nature, provide insights into the moon's early history, its orbital evolution, and its current orientation in the sky, according to lead author Ian Garrick - Bethell, assistant professor of Earth and planetary sciences at UC Santa Cruz.

«This shift to earlier weaning age in the time leading up to woolly mammoth extinction provides compelling evidence of hunting pressure and adds to a growing body of life - history data that are inconsistent with the idea that climate changes drove the extinctions of many large ice - age mammals,» said Cherney, who is conducting the work for his doctoral dissertation in the U-M Department of Earth and Environmental Sciences.

An analysis of temperature through early Earth's history, published the week of April 2 in the Proceedings of the National Academy of Sciences, supports more moderate average temperatures throughout the billions of years when life slowly emerged on Earth.

There are contributions from interstellar matter, from the three - degree - Kelvin background radiation left over from the early history of the universe, from noise that is fundamentally associated with the operation of any detector and from the absorption of radiation by the earth's atmosphere.

These models accurately predict how much water was locked up in the form of ice early in the history of our solar system, billions of years ago, before making its way to Earth.

It is possible that volcanoes, which were much more active early in Earth's history, seeded our planet with life's ingredients.

Alexander Hubbard at the American Museum of Natural History in New York suggests that if the sun had an early outburst — similar to the one that the infant star FU Orionis had starting in 1936 — it would have partially melted the orbiting dust, making it sticky enough to become the seeds of Mercury, Venus, Earth and Mars (Astrophysical Journal Letters, doi.org/b6sc).

Professor Graham Shields - Zhou (UCL Earth Sciences), one of the co-authors and Dr Tostevin's PhD supervisor, said: «We honed in on the last 10 million years of the Proterozoic Eon as the interval of Earth's history when today's major animal groups first grew shells and churned up the sediment, and found that oxygen levels were important to the relationship between environmental conditions and the early development of animals.»

This is a timeline of the history of our planet places the formation of the Jack Hills zircon and a «cool early Earth» at 4.4 billion years.

He wants to spread the knowledge about early lifeduring what he regards as a very exciting time in Earth history.