No Photo Available

Last Update


This profile was last updated on .

Is this you? Claim your profile.

Wrong Hans Thewissen?

Dr. Hans M. Thewissen

Direct Phone: (330) ***-****       

Email: t***@***.edu

Get ZoomInfo Grow

+ Get 10 Free Contacts a Month

Please agree to the terms and conditions

I agree to the Terms of Service and Privacy Policy. I understand that I will receive a subscription to ZoomInfo Community Edition at no charge in exchange for downloading and installing the ZoomInfo Contact Contributor utility which, among other features, involves sharing my business contacts as well as headers and signature blocks from emails that I receive.

Northeastern Ohio Universities College of Medicine

4209 State Route 44

Rootstown, Ohio 44272

United States

Find other employees at this company (5)

Background Information

Employment History


Duke University


Digital Library of Dolphin Development



Web References (200 Total References)

Peru's Lost Empire, Robot Surgery, Lewis and Clark, Spike Is Back! [cached]

"With these new discoveries the whale fossil record is now so complete," Hans Thewissen, of Northeastern Ohio Universities College of Medicine, said.

"It shows us so well how whales became aquatic that it is probably the best, or one of the best, examples of evolution where these major changes are documented with fossils," he added in a telephone interview.
Thewissen and his colleagues uncovered fossils of a fox-size mammal called Ichthyolestes, and Pakicetus which resembled a wolf. The research is reported in the science journal Nature.
The ankle bones are seen only in a group of animals known as artiodactyls such as cows, pigs and hippos. But the heads of the creatures have whale-like features.
"They are whales that were still living on land. Their relatives are a group of even-toed ungulates," Thewissen said, using another term for artiodactyls.

Craig George is working with Hans ... [cached]

Craig George is working with Hans Thewissen of Northeast Ohio Medical University to find out if there is a way to measure hearing damage in whales

About A Moment of Science | A Moment of Science - Indiana Public Media [cached]

Hans Thewissen, Northeastern Ohio Universities

Evolution: The Grand Experiment-Official Site | Whale Evolution [cached]

Dr. Hans Thewissen, Professor of Anatomy at Northeast Ohio Medical University (NEOMED), is a whale evolution expert. He is famous for discovering the walking whale Ambulocetus and a nearly complete skeleton of the walking whale Pakicetus (shown in the picture above).

It appeared that Thewissen had added whale parts (in this case a blowhole) to the areas where he had no fossil evidence, just as his former professor had done. When Dr. Werner began questioning Dr. Thewissen about the shape of the skull and missing fossil parts, Thewissen retracted the entire blowhole idea even though he had supplied the world's top museums with skeletons having blowholes.
Dr. Thewissen had reported seven other whale characters of Ambulocetus, but all of these, according to Dr. Werner, are problematic.
"Dr. Thewissen said that the cheekbone of Ambulocetus was 'reduced' as in modern whales and dolphins; but, in fact, the cheekbone of Ambulocetus is larger than the cheekbone of a horse.
Finally, according to Dr. Werner, Dr. Thewissen also retracted his statement that Ambulocetus had a key feature, a whale-like ear bone called a sigmoid process.
Surprisingly, in our interview, Dr. Thewissen changed his position and suggested that the ear bone of Ambulocetus looked more like a mole rat ear bone.
However, Dr. Zhe-Xi Luo from the Carnegie Museum and Dr. Thewissen from NEOMED called the sigmoid process "questionable" and "equivocal."

The three scientists who made the ... [cached]

The three scientists who made the discovery, Hans Thewissen, assistant professor of anatomy at Northeastern Ohio Medical School; Tasseer Hussain, professor of anatomy at Harvard University; and M Arif, geologist of the Geological Survey of Pakistan, said in the report in the journal Science (263:312, 1994), "...Ambulocetus represents a critical intermediate between land mammals and marine cetaceans [aquatic mammals like the whale and porpoise]."

Similar Profiles

Other People with this Name

Other people with the name Thewissen

Stefan Thewissen
The Institute for New Economic Thinking at the Oxford Martin School

Wim Thewissen
Vandersanden Group SA

Ilona Thewissen
Tiskita Jungle Lodge

Ivo Thewissen
H&M Company, Inc.

Jan Thewissen
Shanks Nederland B.V.

City Directory Icon

Browse ZoomInfo's Business Contact Directory by City

People Directory Icon

Browse ZoomInfo's
Business People Directory

Company Directory Icon

Browse ZoomInfo's
Advanced Company Directory