The origin of dogs is a hot topic among biologists, who've fought over whether there's a single point of origin from wolves and when and where it (or they) happened. A new study suggests the answer is twice, independently, from populations of wolves in western Europe and in east Asia. But they interbred, so most modern dogs are descended from both western and eastern groups.
The geographic and temporal origins of dogs remain controversial. We generated genetic sequences from 59 ancient dogs and a complete (28x) genome of a late Neolithic dog (dated to ~4800 calendar years before the present) from Ireland. Our analyses revealed a deep split separating modern East Asian and Western Eurasian dogs. Surprisingly, the date of this divergence (~14,000 to 6400 years ago) occurs commensurate with, or several millennia after, the first appearance of dogs in Europe and East Asia. Additional analyses of ancient and modern mitochondrial DNA revealed a sharp discontinuity in haplotype frequencies in Europe. Combined, these results suggest that dogs may have been domesticated independently in Eastern and Western Eurasia from distinct wolf populations. East Eurasian dogs were then possibly transported to Europe with people, where they partially replaced European Paleolithic dogs.
The poop of King Penguins releases high levels of nitrous oxide, aka laughing gas. An international team of researchers from China, Denmark, and the UK were studying how the retreat of glaciers and penguins activity impact soil greenhouse gases on South Georgia, an island north of Antarctica. They observed that the penguin guano is rich […]
Will dogs obey commands from robots? In IEEE Spectrum, Evan Ackerman writes that “Yale University’s Social Robotics Lab led by Brian Scassellati presented a paper taking the first step towards determining whether dogs, which are incredibly good at understanding social behaviors in humans, see human-ish robots as agents—or more specifically, whether dogs see robots more […]
Knowledge is power. And a company that knows who its customers are is far more likely to see those customers return. On the web, information gathering often comes in the shape of an online form. Whether it’s a registration, a contest, an order, or just a simple contact, those opportunities to engage with users and […]
It’s impossible for anyone to truly escape the effects our COVID-19 lifestyle changes have made, but if you’re a web developer, there’s a decent chance your work life might be virtually unchanged. Even before the quarantines and work-from-home orders, over 16 percent of web developers were already self-employed. And with a growing number of tech […]
Even though life is emerging following our COVID-19 lockdown, it’s not exactly time to celebrate defeating the insidious virus just yet. CDC officials warn that once a resurgence of the virus hits this winter, it could prove even more disastrous for the U.S. healthcare system than the opening salvo. That would follow the pattern suffered […]