Giant human family tree traces how people moved and married over 300 years

Using crowdsourced data from a social genealogy site, a team of geneticists put together a family tree that includes 13 million people. Researchers used this behemoth of a family tree to investigate how much heredity influences longevity and to track shifts in migration habits and marriage taboos in Europe and North America over the last […]

Gut bacteria key to the vampire bat’s ability to survive on blood

Only three mammalian species are sanguivorous—that’s blood feeding—and they are all bats. Blood, apparently, is not that nutritious. It has almost no carbs, fats, or vitamins; its high iron levels can disrupt heart, liver, and pancreas function; its obscenely high protein and salt levels can cause renal disease if nitrogenous waste products build up. It […]

Machine Learning Crash Course

How does machine learning differ from traditional programming?What is loss, and how do I measure it?How does gradient descent work?How do I determine whether my model is effective?How do I represent my data so that a program can learn from it?How do I build a deep neural network? Source: google

Long Term Depression Permanently Changes the Brain

New brain imaging research from the Centre for Addiction and Mental Health (CAMH) shows that the brain alters after years of persistent depression, suggesting the need to change how we think about depression as it progresses. Source: medicalxpress

Captain Obvious Finally Arrives: Ride-sharing Actually Causes Congestion

A recurring theme among ride-hailing executives from the likes of Lyft and Uber is that their platforms will help reduce congestion in the world’s most populous cities. However, anyone actually living in these places will tell you it doesn’t appear to be working. Cities like New York were already clogged with taxi cabs but, instead […]

James Webb Telescope sun shield snags, further launch delays likely

A new report on the James Webb Space Telescope has found that ongoing technical issues with final testing and assembly of the $8.8 billion project will probably cause the launch date of the oft-delayed instrument to slip again to the right. Presently, NASA is targeting June 2019 for launch aboard an Ariane 5 rocket. Source: […]