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ZSL Thomas Henry Huxley Award and Marsh Prize Winner

News from this site - Thu, 13/06/2019 - 08:58

The Department is delighted to send its congratulations to Dr Erasmus zu Ermgassen whose PhD thesis ‘ Strategies for sustainable livestock production in Brazil and the European Community ' has won this year's Thomas Henry Huxley Award and Marsh Prize , given jointly by the Zoological Society of London and the Marsh...

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UK Parliament Select Committee comes to town

News from this site - Tue, 11/06/2019 - 15:57

The Environmental Audit Committee met in St Catharine’s College Cambridge yesterday (11th June 2019) to take evidence on the threat to the UK and UK Overseas Territories from invasive species. The committee, chaired by Mary Creagh, MP for Wakefield, questioned leading experts in this field on the best ways to manage or...

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DNA from 31,000-year-old milk teeth leads to discovery of new group of ancient Siberians

Cam ac uk zoology department feed - Wed, 05/06/2019 - 18:00

The finding was part of a wider study which also discovered 10,000-year-old human remains in another site in Siberia are genetically related to Native Americans – the first time such close genetic links have been discovered outside of the US.

The international team of scientists, led by Professor Eske Willerslev who holds positions at St John’s College, University of Cambridge, and is director of The Lundbeck Foundation Centre for GeoGenetics at the University of Copenhagen, have named the new people group the ‘Ancient North Siberians’ and described their existence as ‘a significant part of human history’.

The DNA was recovered from the only human remains discovered from the era – two tiny milk teeth – that were found in a large archaeological site found in Russia near the Yana River. The site, known as Yana Rhinoceros Horn Site (RHS), was found in 2001 and features more than 2,500 artefacts of animal bones and ivory along with stone tools and evidence of human habitation.

The discovery is published as part of a wider study in Nature and shows the Ancient North Siberians endured extreme conditions in the region 31,000 years ago and survived by hunting woolly mammoths, woolly rhinoceroses, and bison.

Professor Willerslev said: “These people were a significant part of human history, they diversified almost at the same time as the ancestors of modern-day Asians and Europeans and it’s likely that at one point they occupied large regions of the northern hemisphere.”

Dr Martin Sikora, of The Lundbeck Foundation Centre for GeoGenetics and first author of the study, added: “They adapted to extreme environments very quickly, and were highly mobile. These findings have changed a lot of what we thought we knew about the population history of northeastern Siberia but also what we know about the history of human migration as a whole.”

Researchers estimate that the population numbers at the site would have been around 40 people with a wider population of around 500. Genetic analysis of the milk teeth revealed the two individuals sequenced showed no evidence of inbreeding which was occurring in the declining Neanderthal populations at the time.

The complex population dynamics during this period and genetic comparisons to other people groups, both ancient and recent, are documented as part of the wider study which analysed 34 samples of human genomes found in ancient archaeological sites across northern Siberia and central Russia.

Professor Laurent Excoffier from the University of Bern, Switzerland, said: “Remarkably, the Ancient North Siberians people are more closely related to Europeans than Asians and seem to have migrated all the way from Western Eurasia soon after the divergence between Europeans and Asians.”

Scientists found the Ancient North Siberians generated the mosaic genetic make-up of contemporary people who inhabit a vast area across northern Eurasia and the Americas – providing the ‘missing link’ of understanding the genetics of Native American ancestry.

It is widely accepted that humans first made their way to the Americas from Siberia into Alaska via a land bridge spanning the Bering Strait which was submerged at the end of the last Ice Age. The researchers were able to pinpoint some of these ancestors as Asian people groups who mixed with the Ancient North Siberians.

Professor David Meltzer, Southern Methodist University, Dallas, one of the paper’s authors, explained: “We gained important insight into population isolation and admixture that took place during the depths of the Last Glacial Maximum – the coldest and harshest time of the Ice Age - and ultimately the ancestry of the peoples who would emerge from that time as the ancestors of the indigenous people of the Americas.”

This discovery was based on the DNA analysis of a 10,000-year-old male remains found at a site near the Kolyma River in Siberia. The individual derives his ancestry from a mixture of Ancient North Siberian DNA and East Asian DNA, which is very similar to that found in Native Americans. It is the first time human remains this closely related to the Native American populations have been discovered outside of the US.

Professor Willerslev added: “The remains are genetically very close to the ancestors of Paleo-Siberian speakers and close to the ancestors of Native Americans. It is an important piece in the puzzle of understanding the ancestry of Native Americans as you can see the Kolyma signature in the Native Americans and Paleo-Siberians. This individual is the missing link of Native American ancestry.”

Reference: 
Martin Sikora et al. 'The population history of northeastern Siberia since the Pleistocene.' Nature (2019). DOI: 10.1038/s41586-019-1279-z

Originally published on the St John's College website.

Two children’s milk teeth buried deep in a remote archaeological site in north eastern Siberia have revealed a previously unknown group of people lived there during the last Ice Age.

This individual is the missing link of Native American ancestryEske WillerslevRussian Academy of SciencesThe two 31,000-year-old milk teeth found at the Yana Rhinoceros Horn Site in Russia which led to the discovery of a new group of ancient Siberians


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Sydney Brenner, 1927-2019

News from this site - Wed, 15/05/2019 - 14:17

Sydney Brenner, the 2002 Nobel Prize in Physiology or Medicine winner died last month. He was a colleague and friend of several members of the Department. In 1969 Dr Peter Lawrence , MRC Emeritus Scientist now based here in the Department, was recruited by Brenner and Francis Crick and he worked with them for many years...

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Evolution as Inspiration - Summer art exhibition at the Museum of Zoology

News from this site - Mon, 13/05/2019 - 12:30

An exhibition of artworks by one of the world’s leading naturalists – Jonathan Kingdon – is set to open at the University Museum of Zoology, Cambridge, on 17th May, and will run until 15th September. Kingdon was born in Tanzania in 1935 and lived and worked in East Africa for many years. As well as being one of the world’s...

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Research reveals surprisingly powerful bite of tiny early tetrapod

News from this site - Mon, 13/05/2019 - 11:26

Micro-CT scanning of a tiny snake-like fossil discovered in Scotland has shed new light on the elusive creature, thought to be one of the earliest known tetrapods to develop teeth that allowed it to crush its prey. Detailed scans of Acherontiscus caledoniae showed a unique combination of different tooth shapes and sizes as...

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Testing the role of trait reversal in evolutionary diversification using song loss in wild crickets

News from this site - Wed, 01/05/2019 - 16:37

Bursts of rapid evolutionary diversification are widely observed, but their underlying causes are controversial. Nathan Bailey, University of St Andrews, Sonia Pascoal , Department of Zoology and Fernando Montealegre-Z, University of Lincoln, tested whether secondary loss of sexual traits could play a role in rapid...

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Student Conference for Conservation Science celebrates its 20th Birthday in style

News from this site - Thu, 28/03/2019 - 12:39

"How do you think we can stay optimistic in our research when faced with so many bad news and events happening in recent years?" Inês Maria Simões Silva from Portugal asked Sir David Attenborough, he replied: "We must be optimistic - we don't have an option, we have to point out successes, and show that we are happier...

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Departmental Seminar Day 2019

News from this site - Tue, 26/03/2019 - 15:29

This year’s Departmental Seminar Day saw the department come together for its annual gathering to showcase its research on 22nd March 2019. Short talks were given from across the broad range of subjects currently researched in the department. The talks provide an opportunity for researchers, from all levels, to highlight...

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Department Administrator Vacancy

News from this site - Wed, 13/03/2019 - 16:01

After 15 years as Department Administrator in Zoology Julian Jacobs has decided now is the right time to move on to something new. Julian writes "In this time I have had the good fortune to work in partnership with three supportive HoDs. I treasure the atmosphere of collaboration and collegiality that characterizes Zoology...

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