Sentences with phrase «ice ages»

In that sense, the observed decoupling of temperature and ice - volume changes provides crucial new information for our understanding of how the ice ages developed.

«Crucial new information about how the ice ages came about.»

Earth is thought to have shifted in and out of ice ages every 100,000 years or so during the past 800,000 years, but there is evidence that such a shift took place every 40,000 years prior to that time.

These big ice sheets have frozen and melted many times in the past (producing ice ages with low sea levels and warm periods with high sea levels).

An international team of scientists has discovered new relationships between deep - sea temperature and ice - volume changes to provide crucial new information about how the ice ages came about.

In fact, for temperature the major step toward the ice ages that have characterised the past two to three million years was a cooling event at 2.7 million years ago, but for ice - volume the crucial step was the development of the first intense ice age at around 2.15 million years ago.

Both studies show that most species remain unchanged for hundreds of thousands of years, perhaps longer, and across several ice ages.

Major climatic events such as ice ages ought to leave their imprint on life as species adapt to the new conditions.

The discovery of ice ages in the distant past proved that climate could change radically over the entire globe, which seemed vastly beyond anything mere humans could provoke.

During ice ages, which are mainly driven by rhythmic variations in Earth's orbit and spin that alter sunlight in the Northern Hemisphere, growing ice caps and glaciers trap so much frozen water on land that sea levels can drop a hundred meters or more.

These grooves, it now turns out, play the tune of Earth's ice ages.

Like Earth, Mars has endured ice ages similar to our own.

The seafloor eruptions — big sources of carbon dioxide and other gases — might also help clear up an enduring mystery about ice ages: why they start gradually and end suddenly.

«One of the big questions is: Why was the climate and why were CO2 levels so different during ice ages than during warm times?

For the last 2.5 million years, Earth settled into a rather unusual period of potential instability as we rocked back and forth between ice ages and intervening warm periods, or interglacials.

The Earth's axis fluctuates between having a tilt of 22 degrees and 24 degrees and when the tilt is 24 degrees, there is a larger difference between summer and winter and this has an influence on the violent shifts in climate between ice ages and interglacial periods.

Astronomical factors also play a role in relation to the great changes like the shift between ice ages, which typically lasts about 100,000 years and interglacial periods, which typically last about 10 - 12,000 years.

Generation after generation of your ancestors, reaching back in time through civilisations, ice ages, an epic migration out of Africa, to the very origin of our species.

Ice ages came and went as he went on and on, listing great Tory achievements in the endless European fight and reminiscing about the fields of Waterloo.

We can track most species to a common ancestor species and then due to earths history of m@ss extinctions, minor extinctions, and many ice ages realize that a great many species may have died off due to lack of available food.

ice ages followed by hot periods.

Were the ice ages also a warning from god?

One is changed environmental conditions for a discrete subpopulation of the original population, such as when ice ages cause dramatic changes in sea levels, cutting species into subgroups.

Colin... Your statement of «when ice ages cause dramatic changes in sea levels» is speculation of a possibility, not a scientifically accepted specific hypothesis.

They note past ages that have been equally warm or warmer without human influence, to say nothing of repeating patterns of climate change like ice ages (though I've met one of James Hansen's computer modelers who told me with sincere conviction that there would not be another ice age).

In this one lunch alone, we covered electric cars, climate change, artificial intelligence, the Fermi Paradox, consciousness, reusable rockets, colonizing Mars, creating an atmosphere on Mars, voting on Mars, genetic programming, his kids, population decline, physics vs. engineering, Edison vs. Tesla, solar power, a carbon tax, the definition of a company, warping spacetime and how this isn't actually something you can do, nanobots in your bloodstream and how this isn't actually something you can do, Galileo, Shakespeare, the American forefathers, Henry Ford, Isaac Newton, satellites, and ice ages.

Two new studies show the current is slowly weakening, so it's not threatening an instant ice age, but rather colder weather in Europe, higher sea levels on the U.S. east coast, and depleted fisheries.

«While the specific cover is fake, it is true there was a period in the»70s when people were predicting an ice age,» the official said.

And if Gomez, whose multiyear legal battle is likely to reach a head later this month with a verdict expected on May 24, does land behind bars, the chilling effect on researchers will be of Ice Age proportions.

One popular theory is that the first native North Americans ventured from Asia over an ice - free, Alaskan land bridge to what is now western and central Canada during the Ice Age.

It is a hamfisted cautionary tale about global warming (which, via the film's scientific hand - waving, produces an ice age), but it also functions as a powerful 9/11 allegory, celebrating the ability of New Yorkers to unify in the face of tragedy.

The nation claims that its ancestors fled for survival to a coastal area in Canada that never froze during the Ice Age.

Last week, paleontologist identified the skeleton of an ancient horse that was from an ice age nearly 16000 years ago.

Global temperatures are the hottest since the last ice age and the planet is only getting warmer.

The crisis engulfing the global steel industry is so severe that one of China's top producers has warned a new Ice Age has set in as mills confront overcapacity and Continue Reading

Many species in Yasuní survived the last ice age.

In one sense, the Fed created an ice age for US interest rates by lowering the Fed Funds rate essentially to zero and by printing money to buy US Treasury and mortgage backed securities, putting further downward pressure on longer term interest rates.

The ice age will come.

we can estimate the age of these drawings by the people that once lived there during the last ice age which was 30,000 years ago.

Documented famines with millions of deaths occurred during the little ice age because the cold weather killed the crops.

There was no explanation of why both the medieval warm period and the little ice age, very clearly shown in the 1990 report, had simply disappeared eleven years later.

The March 12, 2015 issue of Nature magazine contains an essay — not an original thesis, rather a summation — by two English geographers entitled «Defining the Anthropocene,» the subject of which is whether (and starting when) human activity has so altered the global environment as to constitute a new geologic age: the Anthropocene Age, as successor to the 11,000 - year Holocene Epoch that is itself part of the larger 2.6 million year - old Quaternary Period (or Great Ice Age).

To the surprise of everyone who knew about the strong evidence for the little ice age and the medieval climate optimum, the graph showed a nearly constant temperature from the year 1000 until about 150 years ago, when the temperature began to rise abruptly like the blade of a hockey stick.

This warm period was followed by the «little ice age» when the Thames would frequently freeze over during the winter.

Because he might hurt someone, and, to quote Manfred the mammoth from the movie Ice Age, part of what you do in a herd is look out for each other.

There is no evidence for significant increase of CO2 in the medieval warm period, nor for a significant decrease at the time of the subsequent little ice age.

[I John 1:8] When I try to say how I see the world, I can't get away from an image that forces itself on me and won't let go: the Ice Age — this slow advance of...

What set this in motion is uncertain, but we think it has something to do with major climatic shifts that were happening around that time — a sudden cooling in the Earth's climate driven by the onset of one of the worst parts of the last Ice Age.

Published on Jan 15, 2013 Over 60,000 years ago, the first modern humans — people physically identical to us today — left their African homeland and entered Europe, then a bleak and inhospitable continent in the grip of the Ice Age.

Science says that there was an ice age about ten thousand years ago and started melting at about that time.