In a study published in Proceedings of the National Academy of Sciences, researchers have shown that orbitally induced strengthening of the Asian summer monsoon played a key role in the dispersal of Homo sapiens from Africa to East Asia during the last interglacial period 125,000 to 70,000 years ago.

Led by Prof. Ao Hong from the Institute of Earth Environment of the Chinese Academy of Sciences (CAS), the researchers integrated a comprehensive compilation of paleoanthropological site data with new high-resolution reconstructions of the Asian summer monsoon based on Chinese loess data, continuous modeling of the East Asian hydroclimate, and a novel human habitat simulation—all covering the past 280,000 years.

Survey the sex lives of Homo sapiens, and you’ll find couples, throuples, harems, and other arrangements of lovers. Fidelity, adultery, and ethically non-monogamous unions. How could one species have evolved myriad ways to mate? Concerning sex, what is natural for us humans?

The number of relatives that an individual has is expected to decrease by more than 35% in the near future. At the same time, the structure of families will change. The number of cousins, nieces, nephews and grandchildren will decline sharply, while the number of great-grandparents and grandparents will increase significantly. In 1950, a 65-year-old woman had an average of 41 living relatives. By 2095, a woman of the same age will have an average of only 25 living relatives.

Diego Alburez-Gutierrez is head of the Research Group Kinship Inequalities at the Max Planck Institute for Demographic Research (MPIDR) in Rostock. Together with Ivan Williams of the University of Buenos Aires and Hal Caswell of the University of Amsterdam, he recently published a study projecting the evolution of human kinship relationships worldwide.

The work is published in the Proceedings of the National Academy of Sciences.

Neanderthals, which disappeared from the archaeological record roughly 40,000 years ago, have long been considered our closest evolutionary relatives. But almost since the first discovery of Neanderthal remains in the 1800s, scientists have been arguing over whether Neanderthals constitute their own species or if they're simply a subset of our own species, Homo sapiens, that has since gone extinct.

So what does the science say? In particular, what does the genetic evidence, which didn't exist back when many early hominins were first discovered, show?

A little-known dog lineage with fur so thick it was spun into blankets was selectively bred for millennia by Native Americans of the Pacific Northwest until its rapid demise following European colonization, a study in Science showed Thursday.

The new research was based on a genetic analysis of "Mutton," one of the last surviving Coast Salish woolly dogs whose pelt was sent to the nascent Smithsonian Institution in 1859, only to be largely forgotten until the early 2000s.

Interviews contributed by Coast Salish tribal co-authors, meanwhile, revealed the dogs occupied a previously underappreciated high-status in Indigenous societies, which revered the animals as members of the family and adorned their most treasured items with their emblem.

Bastards

A new research paper finds that genetic material from Neanderthal ancestors may have contributed to the propensity of some people today to be "early risers," the sort of people who are more comfortable getting up and going to bed earlier.

The findings are published in the journal Genome Biology and Evolution.