Sentences with phrase «at height of last ice age»

In a time period 21,000 years ago called the Last Glacial Maximum, at the height of the last Ice Age, the Southwest was wetter than is seen now — a lot wetter — while the Northwest was much drier, the researchers report.

At the height of the last ice age, sea levels were about 120 metres below present day levels, and the average rise of sea level during the return to our present climate was about 1 metre per one hundred years.

They maintain that the first Americans were the Clovis people, who crossed into the New World from Asia when a fall in sea levels at the height of the last Ice Age created a land bridge, known as Beringia, between the two continents.

Dormant for thousands of years, it once featured a large glacier on its massive peak at the height of the last ice age about 21,000 years ago.

«There must have been significant melt - back of sea ice each summer even at the height of the last ice age to have sea ice formation on the shelves each year.

The original Americans came from Siberia in a single wave no more than 23,000 years ago, at the height of the last Ice Age, and apparently hung out in the north — perhaps for thousands of years — before spreading in two distinct populations throughout North and South America, according to a new genomic analysis.

A controversial find of stone tools in Brazil suggests that humans somehow reached the Americas at the height of the last ice age

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.

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.

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.

Not exact matches

Bar - Yosef points out that, at the time, Earth was in the clutches of the Last Glacial Maximum, the height of the last ice Last Glacial Maximum, the height of the last ice last ice age.

The researchers looked at the pattern of extinctions for 177 species of mammals weighing 10 kilograms or more between 132,000 years ago (the height of the next - to - last ice age to strike the Northern Hemisphere) and 1000 years ago (a time at which the ecological effects of human exploration and expansion became unquestionable).