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1,178 news posts in Mind and body

Life sciences

16 Dec 2024

Completing the timetree of primates: a new way to map the evolutionary history of life on Earth

In a new article published in Frontiers in Bioinformatics, biologists Dr Jack M Craig, Dr Blair Hedges, and Dr Sudhir Kumar, all at Temple University, have built an evolutionary tree that encompasses 455 primates, every species for which genetic data are available. The tree, the most complete of its kind, shows the evolutionary timescale of the whole order of primates, including monkeys, apes, lemurs, lorises, and galagos. In the following guest editorial, Dr Craig describes the steps of obtaining an almost complete timetree for primates and explains the value of such data.

Health

04 Dec 2024

Broken sleep a hallmark sign of living with this common liver disease, scientists find

Researchers from Switzerland have shown that patients with metabolic dysfunction-associated steatotic liver disease (MASLD) suffer poor sleep due to sleep fragmentation and wakefulness. Patients with the more severe form metabolic dysfunction–associated steatohepatitis (MASH) or with cirrhosis, but not healthy volunteers, experienced similar sleep disturbances. Whether poor sleep causes MASLD or vice versa isn’t yet clear. A single sleep hygiene education session proved insufficient to sustainably improve sleep quality and quantity.

Life sciences

25 Nov 2024

Viking colonizers of Iceland and nearby Faroe Islands had very different origins, study finds

Geneticists have studied the distribution of Y-chromosome haplogroups on the Faroe Islands, known to have been colonized by Vikings around the year 900 CE, and compared these to distributions of haplogroups in today’s Scandinavia. They showed with novel analysis methods that the haplotype distribution in the Faroe Islands most closely resembled that in Norway and Denmark, and to a lesser extent that in Sweden, but differed from that in Iceland. They concluded that a band of Viking men from all over Scandinavia colonized the Faroe Islands, which differed in their geographical origin and genetic make-up from those who settled Iceland.