A new study from the Tai Chimpanzee Project in Ivory Coast and the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, shows that orphaned male chimpanzees are less competitive and have fewer offspring of their own than those who continue to live with their mothers. The remaining puzzle is, what is it that their mothers provide that keeps chimpanzees healthy and competitive?
Addressing concerns about gene drive releases in the wild, UC San Diego scientists and their colleagues have developed two new genetic systems that halt or eliminate gene drives after release. Created in fruit flies, the e-CHACRs and ERACRs are powerful gene drive control mechanisms that were meticulously developed and tested at the genetic and molecular levels.
For many livestock species, artificial insemination (AI) is standard. But it can be tricky to achieve success the first time, thanks to variability in ovulation timing across the herd. A new University of Illinois study identifies a naturally occurring sugar that slows the maturation of sperm in pigs, opening up the possibility of extending sperm storage time within the female reproductive tract and increasing the chances of successful fertilization through AI.
A team of international collaborators identifies a new cause of syndromic microcephaly caused by LMNB1 mutations that disrupt the nuclear envelope. The report is published in the October issue of the American Journal of Human Genetics.
Scientists have found that the "segmentation clock"--a genetic network that governs the body pattern formation of embryos--progresses more slowly in humans than in mice because the biochemical reactions are slower in human cells. The differences in the speeds of biochemical reactions may underlie differences between species in the tempo of development.
Why do pregnancies last longer in some species than others? Researchers at the Francis Crick Institute have found the clock that sets the speed of embryonic development and discovered the mechanism is based on how proteins are made and dismantled. The study, published in Science, could also help us understand how different mammals evolved from one another and help refine methods for regenerative medicine.
Researchers at UChicago find that the molecular mechanisms underlying tail regeneration in West African lungfish are similar to those seen in amphibians, suggesting the trait evolved in a common ancestor.
An international collaboration between researchers at Queen Mary University of London and the Chinese Academy of Science in Nanjing has led to the discovery of world's oldest animal sperm inside a tiny crustacean trapped in amber around 100 million years ago in Myanmar.
Tortoises are born with a natural preference for faces, according to new research from scientists at Queen Mary University of London, the University of Trento and the Fondazione Museo Civico Rovereto.
Female whale sharks grow more slowly than males but end up being larger, research suggests.