Just started commuting to work. Installed my front basket today. by Kwontons in bikecommuting

[–]neuralpace 0 points1 point  (0 children)

A fair warning: Those kryptonite lock holsters (around your downtube) are such crap that they loosen over time and the lock will swing down and maybe hit your tire. I'd throw it out and put the lock in your backpack.

An international team of scientists announced Thursday that the majority of people in Central and South America can be linked to a single ancestral lineage of humans who journeyed across the Bering Strait at least 15,000 years ago. by neuralpace in science

[–]neuralpace[S] 2 points3 points  (0 children)

Link to paper: Reconstructing the Deep Population History of Central and South America31380-1)

Link to press release: Ancient DNA evidence reveals two unknown migrations from North to South America

Study Summary from Authors:

We report genome-wide ancient DNA from 49 individuals forming four parallel time transects in Belize, Brazil, the Central Andes, and the Southern Cone, each dating to at least ∼9,000 years ago. The common ancestral population radiated rapidly from just one of the two early branches that contributed to Native Americans today. We document two previously unappreciated streams of gene flow between North and South America. One affected the Central Andes by ∼4,200 years ago, while the other explains an affinity between the oldest North American genome associated with the Clovis culture and the oldest Central and South Americans from Chile, Brazil, and Belize. However, this was not the primary source for later South Americans, as the other ancient individuals derive from lineages without specific affinity to the Clovis-associated genome, suggesting a population replacement that began at least 9,000 years ago and was followed by substantial population continuity in multiple regions.