- Dec 22, 2014
- Reaction score
- Wessex and Mercia
Story of Mammoth Survival Is in the Soil
Ancient DNA preserved in soil may rewrite what we thought about the Ice Age
Based on bone and tooth records, the Yukon's last mammoths were thought to have gone extinct about 12,000 years ago. But a new genetic sampling technique suggests the great beasts may have stuck around a lot longer, plodding through the Arctic tundra with bison and elk for thousands of years more. The story is in the soil.
Bones are rich sources of prehistoric genetic information, but not the only ones; items ranging from shed Ice Age skin cells to pine needles can contribute to the genetic record stored in dirt. Paleogeneticists have been extracting and analyzing “environmental DNA” from soil for a long time, but getting rid of non-DNA material without destroying these fragile clues is daunting. ...
In their study, the researchers detected about 2,100 kinds of plants and 180 animals—including American horses and woolly mammoths, in samples from soil dated to thousands of years after their supposed extinction. ...
Open to a lot of possibilities here, including a hoax, but Siberia is a vast area, and much of it has not had humans to set foot on it, so I'm open to small numbers of them still being around..
Definately a bear with a fish, or a tiny trunkless, earless, tuskless mammoth with a fishOpen to a lot of possibilities here, including a hoax, but Siberia is a vast area, and much of it has not had humans to set foot on it, so I'm open to small numbers of them still being around..
It is widely thought that the columbian mammoth (as opposed to the wooly mammoth) out lived its hairy cousin by quite a while, due to the fact that the columbian mammoth had less humans around to hunt it to extinction abd its ability to survive milder temperatures.Analysis of prehistoric environmental DNA from the Yukon suggests mammoths and American horses survived thousands of years longer than previously believed.
FULL STORY: https://www.scientificamerican.com/article/story-of-mammoth-survival-is-in-the-soil/
It is widely thought that the columbian mammoth (as opposed to the wooly mammoth) out lived its hairy cousin by quite a while, due to the fact that the columbian mammoth had less humans around to hunt it to extinction abd its ability to survive milder temperatures.
Nice, thank youIf you're interested in the possibility of archaic members of the elephant family surviving in the Americas well into the time of recorded history, try this thread:
Oldest sequenced DNA belonged to 1 million-year-old mystery mammoth
The oldest DNA ever decoded belonged to a mammoth from a mysterious, previously unknown lineage that lived about 1.2 million years ago, a new study finds.
Previously, the oldest known sequenced genome came from a horse that lived up to 780,000 years ago, in what is now Canada's Yukon Territory. Now, the mammoth discovery, "is, with a wide margin, the oldest DNA ever recovered" ...
The remains of the mysterious mammoth were discovered near Siberia's Krestovka River (now the mammoth's namesake). After studying its ancient DNA, along with the newly sequenced genomes of two other mammoths — a roughly 700,000-year-old woolly mammoth (Mammuthus primigenius) and an approximately 1 million-year old woolly mammoth predecessor — the scientists made a surprising discovery: Woolly mammoths mated with a mammoth from Krestovka's mysterious line about 420,000 years ago, leading to a hybrid mammoth we know today as the Columbian mammoth (Mammuthus columbi). ...
The Krestovka mammoth lineage, the researchers found, would have migrated from Siberia to North America, crossing over the Bering Strait land bridge, about 1.5 million years ago; fossil evidence suggests that the woolly mammoth crossed over about 100,000 years ago, but the researchers say it could have come earlier, perhaps 500,000 to 400,000 years ago.
It's unknown where the hybridization occurred, but when they met up, "these two lineages hybridized and formed what we now call the Columbian mammoth" ...
A newly discovered and analyzed Siberian mammoth has yielded 3 significant discoveries:
- the oldest DNA ever sequenced (1.2 million years old);
- a new, previously unsuspected species of mammoth; and
- an explanation for the lineage of the Columbian mammoth species.