Quotes About Megafauna

Why, then, did it disappear 45,000 years ago? Of course, if diprotodons had been the only large animal to disappear at this time, it might have been just a fluke. But more than 90 percent of Australia's megafauna disappeared along with the diprotodon

When the first Americans marched south from Alaska into the plains of Canada and the western United States, they encountered mammoths and mastodons, rodents the size of bears, herds of horses and camels, oversized lions and dozens of large species the likes of which are completely unknown today, among them fearsome sabre-tooth cats and giant ground sloths that weighed up to eight tons and reached a height of twenty feet.

About thirty-five genera of mammals disappear from America, about half of them in a brief window of 500 years, 13,200 to 12,700 years ago, with Clovis hunters occupying the core of that time period. A sudden cooling, the Younger Dryas, descends on the Earth by 12,880 years ago, marking the terminal appearance of many of these animals. Suspected causes of the YD are still contentious. But it signals the end of Clovis and much of the megafauna.

Alroy has described the megafauna extinction as a "geologically instantaneous ecological catastrophe too gradual to be perceived by the people who unleashed it

When the chronology of extinction is critically set against the chronology of human migrations," Paul Martin of the University of Arizona wrote in "Prehistoric Overkill," his seminal paper on the subject, "man's arrival emerges as the only reasonable answer" to the megafauna's disappearance.

All they had to do was pick off a mammoth or a giant ground sloth every so often, when the opportunity arose, and keep this up for several centuries. This would have been enough to drive the populations of slow-reproducing species first into decline and then, eventually, all the way down to zero.

Alroy has described the megafauna extinction as a "geologically instantaneous ecological catastrophe too gradual to be perceived by the people who unleashed it.

The teeth had roots the length of a human hand, and each one weighed nearly ten pounds.

los neandertales siguieron el destino del Megatherium, el mastodonte americano, y de tantos otros desafortunados miembros de la megafauna. En otras palabras, tal como me lo expresó un investigador, «su mala suerte fuimos nosotros».

Its demise was part of a wave of disappearances that has come to be known as the megafauna extinction. This wave coincided with the spread of modern humans and, increasingly, is understood to have been a result of it. In this sense, the crisis Cuvier discerned just beyond the edge of recorded history was us.

In fact, the American Mastodon vanished around thirteen thousand years ago. Its demise was part of a wave of disappearances that has come to be known as the megafauna extinction. This wave coincided with the spread of modern humans and, increasingly, is understood to have been a result of it. In this sense, the crisis Cuvier discerned just beyond the edge of recorded history was us.

In a similar vein, Jared Diamond has observed: "Personally, I can't fathom why Australia's giants should have survived innumerable droughts in their tens of millions of years of Australian history, and then have chosen to drop dead almost simultaneously (at least on a time scale of millions of years) precisely and just coincidentally when the first humans arrived.

Beavers the size of armchairs; turtles that weighed almost as much as cars; sloths able to reach tree branches twenty feet high; huge, flightless, predatory birds like rapacious ostriches—the tally of Pleistocene monsters is long and alluring.

Did man, after his first inroad into South America, destroy, as has been suggested, the unwieldy Megatherium and the other Edentata?

About 15,000 years ago, the American West looked much as Africa's Serengeti Plains do today, with herds of elephants and horses pursued by lions and cheetahs, and joined by members of such exotic species as camels and giant ground sloths.

Australia / New Guinea today has no equally large mammals, in fact no mammal larger than 100-pound kangaroos. But Australia / New Guinea formerly had its own suite of diverse big mammals, including giant kangaroos, rhinolike marsupials called diprotodonts and reaching the size of a cow, and a marsupial "leopard." It also formerly had a 400-pound ostrichlike flightless bird, plus some impressively big reptiles, including a one-ton lizard, a giant python, and land-dwelling crocodiles.

The near-simultaneous disappearance of so many large species raises an obvious question: what caused it? An obvious possible answer is that they were killed off or else eliminated indirectly by the first arriving humans. Recall