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Ancient Squirrel Poop Reveals Mammoth Meals
9 Jun
Summary
- Fossilized squirrel droppings contain DNA from mammoths and saber-toothed cats.
- Yukon's permafrost preserved the ancient feces for an estimated 700,000 years.
- Thawing permafrost poses a threat to these invaluable ancient genetic samples.
A remarkable discovery in Yukon, Canada, suggests ancient ground squirrels consumed meat from much larger animals, including mammoths and saber-toothed cats. Fossilized droppings, unearthed from dens preserved in permafrost for approximately 700,000 years, have provided compelling evidence. Researchers analyzed these ancient feces, finding DNA fragments of these extinct megafauna.
This finding challenges previous assumptions about the diet of these small rodents. Scientists believe the squirrels likely scavenged on the carcasses of these large animals, a behavior consistent with modern ground squirrels' opportunistic feeding habits. The exceptional preservation of the droppings in the icy Yukon landscape offers an unprecedented window into prehistoric ecosystems.
However, this invaluable scientific record is now under threat. As global temperatures rise and permafrost thaws, the genetic material within these ancient samples is at risk of degradation. Researchers are in a race against time to collect and preserve these specimens before they are lost forever.
