Sentences with phrase «[peak of the last ice age»

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.

Sea level has been rising slowly and inexorably since the end of the last ice age, and the rate has not accelerated in a warming climate.

There is no reliable evidence of modern humans elsewhere in the Old World until 60,000 - 40,000 years ago, during a short temperate period in the midst of the last ice age.

«13,000 - year - old human footprints found off Canada's Pacific coast: New evidence of human population living on the west coast of Canada at the end of last ice age.»

For example, about 15,000 years ago, we came out of the last Ice Age as amazingly skilled hunters; we had to be to survive its rigors.

In this study, the research team excavated intertidal beach sediments on the shoreline of Calvert Island, British Columbia, where the sea level was two to three meters lower than it is today at the end of the last ice age.

Ergo, Hancock concludes, «at the very least it would mean that some as yet unknown and unidentified people somewhere in the world, had already mastered all the arts and attributes of a high civilization more than twelve thousand years ago in the depths of the last Ice Age and had sent out emissaries around the world to spread the benefits of their knowledge.»

Some 20,000 years ago, it was a different story: Earth was in the grip of the last ice age, and raccoon dogs were stuck in a small area of east Asia.

«13,000 - year - old human footprints found off Canada's Pacific coast: New evidence of human population living on the west coast of Canada at the end of last ice age.»

That's consistent with the fossil record, which shows glyptodonts evolved from medium - sized forms (about 80 kilograms) to become true megafauna in the Pleistocene (reaching 2,000 kilograms) before their disappearance at the end of the last ice age.

Liu and his colleagues started their modeling at about 21,000 years ago — the zenith of the last ice age.

Dr Hillenbrand continues: «Our reconstruction shows that warm deep water flooded Pine Island Bay at the end of the last ice age.

At the end of the last ice age, atmospheric carbon dioxide levels shot up by nearly 50 per cent.

Scientists from Rice University and Texas A&M University - Corpus Christi's Harte Research Institute for Gulf of Mexico Studies have discovered that Earth's sea level did not rise steadily but rather in sharp, punctuated bursts when the planet's glaciers melted during the period of global warming at the close of the last ice age.

Professor Gavin Foster, from the University of Southampton, said: «The Intergovernmental Panel on Climate Change have shown that climate models can successfully simulate climates from the freezing world of the last Ice Age, to the intense warmth of the «Eocene greenhouse», 50 million years ago.

Even when sea levels were at their lowest, about 22,000 years ago at the height of the last ice age, the islands were likely out of the deer's swimming range.

People living in northern Africa just after the end of the last ice age were cooking plants — and the gunk left on their pots proves it.

He says, however, Larsen B may have persisted as far back as 100,000 years, the beginning of the last ice age.

The analysis is based on the fact that as the world warmed following the coldest part of the last ice age 20,000 years ago, the ice deep inside the Antarctic glaciers warmed more slowly than Earth's surface, just as a frozen turkey put into a hot oven will still be cold inside even after the surface has reached oven temperature.

Thousands of marks on the Antarctic seafloor, caused by icebergs which broke free from glaciers more than ten thousand years ago, show how part of the Antarctic Ice Sheet retreated rapidly at the end of the last ice age as it balanced precariously on sloping ground and became unstable.

These «Western Hunter - Gatherer's» migrated into Europe at the end of the last ice age and the group included Cheddar Man's ancestors,» explained Professor Thomas.

At the end of the last ice age, both horse groups became extinct in North America, along with other large animals like woolly mammoths and saber - toothed cats.

They found that, as seas warmed at the end of the last ice age, Pine Island Glacier retreated to a point where its grounding line — the point where it enters the ocean and starts to float — was perched precariously at the end of a slope.

Was it humankind or climate change that caused the extinction of a considerable number of large mammals about the time of the last Ice Age?

Ask any schoolkid how the first people came to the Americas, and you might get some version of the following: They crossed a spit of land connecting Alaska and Siberia and made their way south between melting glaciers at the end of the last ice age.

When the seas rose at the end of the last ice age, all hell broke loose.

Scientists believed the Siberian forebears of Native Americans arrived 9,000 years ago, at the end of the last ice age.

And in many places, it's moving faster than the ice is thought to have retreated during the warming period at the end of the last ice age, around 20,000 years ago.

The end of the last ice age was a dynamic time in North America.

Mammoths» Last Stand St. Paul's landscape of treeless tundra has likely changed little since the end of the last ice age, some 12,000 years ago.

At the peak of the last ice age, around 21,000 years ago, it was a volcanically active spot on the southern edge of the Bering Land Bridge.

The human transformation of the planet is now bigger than the end of the last ice age.

The heyday of the woolly mammoth was the Pleistocene Epoch, stretching from 1.8 million years ago to the end of the last ice age 11,000 years ago.

The thrust of the genetic and archaeological evidence is that the ancestors of Native Americans walked or paddled from Siberia between 13,000 and 17,000 years ago, at the height of the last ice age.

Humanity has now raised global CO2 levels by more than the rise from roughly 180 to 260 ppm at the end of the last ice age, albeit in a few hundred years rather than over more than a few thousand years.

That doesn't sound like much, but it equals the temperature rise since the end of the last ice age, and the consequences could be devastating.

Shakhova says it may have been going on since the frozen shelf was inundated by seawater at the end of the last ice age.

Using sediment gathered from the ocean floor in different areas of the world, the researchers were able to confirm that as the ice sheets started melting and the climate warmed up at the end of the last ice age, 18,000 years ago, the marine nitrogen cycle started to accelerate.

The location, date, and composition of the artifacts suggest not only that our ancestors had adapted to the climate, says Michael Waters, an archaeologist at Texas A&M University, but that they may also have been in a position to migrate across the Bering Land Bridge to North America before glaciers closed off the route at the height of the last ice age.

This drift is due to the changes in the distribution of Earth's mass as the crust slowly rebounds after the end of the last ice age.

A McGill - led international research team has now completed the first global study of changes that occurred in a crucial component of ocean chemistry, the nitrogen cycle, at the end of the last ice age.

Several studies have shown that around 10,000 years ago, as the planet came out of the last ice age, vast portions of volcanic summit cones collapsed, leading to enormous landslides.

«Detailed chemical measurements in Antarctic ice cores show that massive, halogen - rich eruptions from the West Antarctic Mt. Takahe volcano coincided exactly with the onset of the most rapid, widespread climate change in the Southern Hemisphere during the end of the last ice age and the start of increasing global greenhouse gas concentrations,» according to McConnell, who leads DRI's ultra-trace chemical ice core analytical laboratory.

«We were expecting to find rocks exposed for 20,000 years, the date of the peak of the last ice age, but these moraines were much younger.

Stone - age people lived in the lands north of the Arctic Circle before the peak of the last Ice Age — much earlier than had been thought, suggests new findings.

An international team of scientists has found that the climatic events that ended the ice age before last are surprisingly different to those of the last ice age.

Ever since the end of last ice age 15,000 yrs ago.Before that it was 100,000 yrs of ice age.

«Generally, people have assumed from well - documented North American and European records that the largest glaciers should have come in the peak of the last ice age,» Batbaatar said.

The new results reveal that the pattern of modern ice loss is similar to that which has prevailed since the end of the last ice age.

A number of theories have been developed over the years to explain more recent extinctions such as those at the end of the last ice age, including human hunting, climate change, disease, and even a cosmic impact such as an asteroid or comet.