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Skin has changed color in human lineages much faster than supposed

Your Family May Once Have Been A Different Color

clipped from www.npr.org Your Family May Once Have Been A Different Color Skin has changed color in human lineages much faster than scientists had previously supposed, even without intermarriage according to professor Nina Jablonski Whatever color you see there is what experts call your basic skin color the one you have now is very probably not the color your ancient ancestors had — even if you think your family has been the same color for a long, long time Recent developments in comparative genomics allow scientists to sample the DNA in modern humans By creating genetic "clocks," scientists can make fairly careful guesses about when particular groups became the color they are today scientists can go further: They can wind the clock back and see what colors these populations were going back tens of thousands of years clipped from www.npr.org map shows average skin color across the globe clipped from www.npr.org Over the last 50,000 years, populations have gone from dark pigmented to lighter skin, and people have also gone the other way

clipped from www.spring.org.uk The Psychology of Attention › How attention works, what happens when it fails and how it can be improved. Attention is one of the most fascinating and highly researched areas in psychology. Psychologists have found that with training we can perform impressive feats of multitasking, we can divide our visual attention (without moving our eyes) and we are surprisingly effective at picking out just one voice from a multitude. This series of posts looks at how attention works, how it fails and what we can do to improve it. 1. The Cocktail Party Effect 2. The Attentional Spotlight 3. Learning to Multitask: Simultaneous Reading and Writing 4. Can Visual Attention Truly Be Divided? 5. 18 Ways Attention Goes Wrong 6. Attentional Blink and the Stream of Consciousness 7. How Meditation Improves Attention