Sentences with phrase «grew during the ice ages»

Not exact matches

This finding adds to the growing body of evidence supporting the hypothesis that humans used a coastal route to move from Asia to North America during the last ice age.

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.

The surface of a mammoth tooth looks like a washboard, perfect for grinding grasses that grew during the last ice age.

The land bridge forms during ice ages, when much of the water on the planet becomes part of growing continental glaciers, making the sea level much lower than it is today,» explained Shapiro.

Similarly, during the Little Ice Age between 1300 and 1850 AD, montane glaciers as well as Greenland and Antarctic ice sheets, grew and reached their largest extent in the last 7,000 yeaIce Age between 1300 and 1850 AD, montane glaciers as well as Greenland and Antarctic ice sheets, grew and reached their largest extent in the last 7,000 yeaice sheets, grew and reached their largest extent in the last 7,000 years.

I find it interesting to note that during the last ice age, Eastern White Pine grew on the Grand Banks off the coast of New England.

The studies show that the ice sheet shrank and grew again to a much greater extent than assumed during the last ice age.

Umm, or get ruined by drought or deluge or reduced by shortened growing season as happened during the Little Ice Age and the Dark Age Cooling?

There is a level that is approached during the ice ages below which plant life does not grow very well at all.

It has been warmer than the present for much of the ten thousand years since the last big ice age: it was a little warmer for a few centuries in the medieval warm period around 1100 (when Greenland was settled for grazing) and also during the Roman - Climate Optimum at the time of the Roman Empire (when grapes grew in Scotland), and at least 1 °C warmer for much of the Holocene Climate Optimum (four to eight thousand years ago).

They also mention glaciers, but do not tell their readers that glaciers worldwide grew massively between the Middle Ages and the mid 19thC, in other words during the Little Ice Age.

Linden / Giessen is where one of the main series of the late Ernst Beck's 1942 «peak» in CO2 was based on: Further, land plants as usual grow on land, where CO2 levels are average 40 ppmv higher than background and even higher during inversion, giving at least a few hours of sufficient CO2 during ice ages.

Here, we argue that the twentieth and twenty - first centuries, a period during which the overwhelming majority of human - caused carbon emissions are likely to occur, need to be placed into a long - term context that includes the past 20 millennia, when the last Ice Age ended and human civilization developed, and the next ten millennia, over which time the projected impacts of anthropogenic climate change will grow and persist.

Thus, the Norse reached Greenland during a period good for growing hay and pasturing animals... Around 1300, though, the climate in the North Atlantic began to get cooler and more variable from year to year, ushering in a cold period termed the Little Ice Age that lasted into the 1800s.

In fact, if humankind was really as dumb as the fans of DPS would have us believe, we wouldn't be around today to hear their doomsaying, because Homo sapiens would have been wiped out during vastly larger environmental swings (in and out of ice ages, for example) in our past, than those expected as a consequence of the burning of fossil fuels to produce the energy that powers our world — a world in which the human life expectancy, perhaps the best measure of our level of «dumbness» or «smartness» — has more than doubled over the last century and continues to grow ever longer.

He cited periods of warming during the Roman Empire and in the Middle Ages — when Vikings grew crops on Greenland — and cooler phases such as the Dark Ages and the Little Ice Age from 1300 to 1850.

Argues that the twentieth and twenty - first centuries, a period during which the overwhelming majority of human - caused carbon emissions are likely to occur, need to be placed into a long - term context that includes the past 20 millennia, when the last Ice Age ended and human civilization developed, and the next ten millennia, over which time the projected impacts of anthropogenic climate change will grow and persist

But just on the chance that they are, harsh winter temperatures and shorter growing seasons like those that occurred during the «Little Ice Age» between about 1300 - 1850 are nothing to wish for.