
The ability to see depends on more than just healthy eyes sending signals to a working brain. The brain must also learn how to interpret the incoming information. Neurologists have long been convinced that there is a critical period before age 6 during which this must happen or else the brain's visual abilities will never be configured. A child who is born blind but whose sight can be restored by surgery thus has a limited time to undergo an operation. But this window is bigger than previously thought. Scientists from MIT published a paper in Psychological Science about a 32-year-old woman in India whose cataracts were removed at age 12. Investigators who recently caught up with her found that while her vision will never be 20/20, she does see reasonably well, giving new hope to many blind kids.
See Full ListMorality and empathy are writ deep in our genes. Alas, so are savagery and bloodlust. Science is now learning what makes us both noble and terribleand perhaps what can make us better
Here are some of the dilemmas used to study human morality. Take this quiz to see how you compare to other TIME.com readers
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