What killed the great beasts of North America?Breaking News
Until about 11,000 years ago, mammoths, giant beavers, and other massive mammals roamed North America. Many researchers have blamed their demise on incoming Paleoindians, the first Americans, who allegedly hunted them to extinction. But a new study fingers climate and environmental changes instead. The findings could have implications for conservation strategies, including controversial proposals for “rewilding” lions and elephants into North America.
The idea that humans wiped out North America’s giant mammals, or megafauna, is known as the “overkill hypothesis.” First proposed by geoscientist Paul Martin more than 40 years ago, it was inspired in part by advances in radiocarbon dating, which seemed to indicate an overlap between the arrival of the first humans in North America and the demise of the great mammals. But over the years, a number of archaeologists have challenged the idea on several grounds. For example, some researchers have argued that out of 36 animals that went extinct, only two—the mammoth and the mastodon—show clear signs of having been hunted, such as cuts on their bones made by stone tools. Others have pointed to correlations between the timing of the extinctions and dramatic fluctuations in temperatures as the last ice age came to a halting close.
comments powered by Disqus
- Why Trump Would Almost Certainly Be Violating the Constitution If He Continues to Own His Businesses
- Remembering Pearl Harbor Brings ‘Date Which Will Live in Infamy’ to Virtual Reality
- Will Trump back women’s museum?
- New scholarship coming to Mormon lessons, but will instructors really teach it?
- Why the history of slavery in the US South is taking centre stage once again
- Novelist says History classes are our best hope for teaching Americans to question fake news and Donald Trump
- National Book Award winner Ibram X. Kendi is youngest in 30 years in the non-fiction category
- Historian Volker Ullrich’s book on the rise of Hitler is spookily relevant
- People are still talking about historian Mark Lilla’s NYT op ed 2 weeks after it was published
- Rick Perlstein says Trump’s election confirms a paranoid trend in the GOP