When a baby does not make it to term, an irregular number of chromosomes in the embryo is often the root cause. The phenomenon, known as aneuploidy, is surprisingly common: it can be detected in roughly three-quarters of human embryos … Continue reading
Journal Club
Highlighting recently published papers selected by Academy members
Category Archives: Evolution
Journal Club: Newly found mutation contributes to irregular chromosome number, a major cause of pregnancy loss
Categories: Evolution | Genetics | Journal Club | Reproductive biology
Tagged aneuploidy, chromosome, embryo, fertility, human evolution, in vitro fertilization, natural selection, pregnancy
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Journal Club: Age of ‘Little Foot’ provides twist in story of hominid evolution
An early hominid named Little Foot has been dated to 3.67 million years old, making the timeline of human evolution even more complicated. Little Foot was found in a cave at Sterkfontein in South Africa, an hour’s drive from Johannesburg … Continue reading
Categories: Anthropology | Evolution | Journal Club
Tagged fossil, hominid, human evolution, isochron burial dating
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Journal Club: High-throughput sequencing transforms the study of human evolution
In the last five years, great strides have been made in the field of human evolution, such as the sequencing of the Neanderthal genome that revealed that modern humans and Neanderthals interbred, and the discovery of an extinct branch of … Continue reading
Categories: Anthropology | Evolution | Genetics | Journal Club
Tagged genetics, human evolution, Journal Club
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First Look: Banked seed replantings affected by climate change
Plants that are not able to rapidly adapt to climate change may decline and disappear from their previous habitats, prompting dramatic projects such as a doomsday vault for seeds of the world. Now researchers suggest find that seeds banked only … Continue reading
Categories: Evolution
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Wasps selectively pass protective bacteria on to their offspring
Symbiotic microbes are essential for the survival of many animals and plants, but the factors promoting such partnerships remain poorly understood. Now researchers find that wasps can block which bacteria their offspring receive, helping them maintain exclusive partnerships with specific … Continue reading
Categories: Evolution
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Evidence for speciation without geographic isolation seen in “Evolution Canyon”
The birth of a new species, the event known as speciation, is usually thought to happen when one species gets split into two or more physically isolated populations that diverge over time as they accumulate differences without interbreeding. However, it … Continue reading
Categories: Evolution
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Social competition produces sexy sons
Social competition among mice cause mothers to give birth to sexy sons who smell great and die young. This is one of the first studies to demonstrate epigenetic effects contributing to increased mating success in offspring, report biologists in a … Continue reading
Bats may have been first mammal hosts of malaria
Malaria is a scourge on humanity, afflicting more than 200 million people worldwide annually. Now scientists find bats may have been the first mammals to host the group of parasites that include the germs behind malaria, report findings detailed in … Continue reading
Categories: Evolution
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Cheaters always prosper, to a point
Is it better to cooperate or cheat? To work for the good of others, or focus on yourself? This classic self vs. group conflict is a common musing of game theorists and experimental economics known as the “public goods dilemma.” … Continue reading
Categories: Ecology | Evolution
Tagged ants, behavior, game theory, insects, social insects
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Some frogs hears with their mouths
One of the world’s smallest frogs, the one-centimeter-long Gardiner’s Seychelle frog, lacks a middle ear with an eardrum yet it can hear. Scientists now find it can use its mouth and bones to hear, findings detailed this week in the … Continue reading