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IMAGE: Artist s reconstruction showing the life stages of the fossil lamprey Priscomyzon riniensis. It lived around 360 million years ago in a coastal lagoon in what is now South Africa.
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Credit: Kristen Tietjen
A new study out of the University of Chicago, the Canadian Museum of Nature and the Albany Museum challenges a long-held hypothesis that the blind, filter-feeding larvae of modern lampreys are a holdover from the distant past, resembling the ancestors of all living vertebrates, including ourselves. The new fossil discoveries indicate that ancient lamprey hatchlings more closely resembled modern adult lampreys, and were completely unlike their modern larvae counterparts. The results were published on March 10 in
Study suggests later evolutionary shift to blood-cell production in bones elifesciences.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from elifesciences.org Daily Mail and Mail on Sunday newspapers.
Vincent Lynch, assistant professor
Department of Biological Sciences
A new study illuminates how a gene called HAND2 may have a hand in the timing of human labor.
“We don’t know why humans go into labor. It’s a basic aspect of human biology that we just don’t know the answer to, and it’s kind of embarrassing that we don’t,” says senior author and UB evolutionary biologist Vincent Lynch. “What happens in many other animals is that as gestation goes on, the level of progesterone keeps going up, and then a few hours before birth, progesterone levels drop to pre-pregnancy levels. Progesterone inhibits contractions, so once you lose it, the uterus starts contracting and the baby is born.
Study illuminates the role of HAND2 gene in timing of human labor news-medical.net - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from news-medical.net Daily Mail and Mail on Sunday newspapers.
University at Buffalo
A study explores the role of HAND2 in human and mammalian pregnancy
Vincent Lynch, assistant professor of biological sciences
University at Buffalo
BUFFALO, N.Y. A new study illuminates how a gene called HAND2 may have a hand in the timing of human labor.
“We don’t know why humans go into labor. It’s a basic aspect of human biology that we just don’t know the answer to, and it’s kind of embarrassing that we don’t,” says senior author Vincent Lynch, an evolutionary biologist at the University at Buffalo. “What happens in many other animals is that as gestation goes on, the level of progesterone keeps going up, and then a few hours before birth, progesterone levels drop to pre-pregnancy levels. Progesterone inhibits contractions, so once you lose it, the uterus starts contracting and the baby is born.