Centre for Palaeogenetics Profile picture
CPG brings scientists from diverse disciplines together in a state-of-the-art aDNA research facility, and is jointly run by @Stockholm_Uni and @naturhistoriska.
Jun 27 11 tweets 5 min read
Woolly mammoths survived on Wrangel Island until 2000 BC!

But why did they go extinct?
Were they doomed once stuck on the island?

We went to Siberia, collected bones & teeth, and sequenced 21 complete genomes.

Here is what we found (🧵)

Paper in Cell: cell.com/cell/fulltext/…
Image Wrangel Island is a small island off the Siberian coast. The last mammoth population became isolated there around 10,000 years ago, when the island was cut off from the mainland due to rising sea levels. Our results show that less than 10 individuals survived the isolation event. Image
Feb 17, 2021 6 tweets 3 min read
This mammoth tooth is 1.2 million years old.

We have recovered DNA from it.

This is the oldest DNA ever sequenced.

The results are published today in Nature:
nature.com/articles/s4158…

[THREAD] ⬇️⬇️⬇️ We analyzed genomes from mammoths that lived 1.2 - 0.7 million years ago (Ma), and discovered a previously unknown genetic lineage of mammoth that diverged from from the woolly mammoth lineage more than 2 Ma. We call this new lineage the “Krestovka mammoth”.
Aug 17, 2020 4 tweets 4 min read
Follow this thread for an almost unbelievable story, hiding in the SI of this paper:
cell.com/current-biolog…

Ten years ago, a roughly 14,000 year old frozen #dog or #wolf #puppy was found in Russia. It's been named Tumat.

Subsequently, an autopsy of Tumat was conducted (1/n). Inside the puppy's stomach, @MhsSindging, Sergey Fedorov & others found a hairy piece of tissue.

The mystery tissue from Tumat's tummy was sent to #CpgSthlm, where @nibbledtodeath extracted DNA to identify the species that the tissue belonged to.

It came from... (2/n).