This video excerpt from NOVA uncovers the genetic mystery that nearly killed Alexis, now 14, and introduces the debate surrounding genetic testing at birth. After diagnosing Alexis and her twin brother Noah with cerebral palsy at a young age, doctors later discovered that the twins shared a rare gen
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Feelings of happiness come from the brain’s own opioids. Material things activate the brain's reward center, however, they only create a brief sense of happiness. Social rewards last longer, as they activate areas of the cerebral cortex. Authors: ZDF/Terra Xpress/Autorenkombinat/Birthe Heer/Maximil
Birds have much smaller brains than humans. They also lack the cerebral cortex, where human thinking takes place. However, the density of neurons in a bird's brain is higher. In other words, birds pack more brainpower into less space. Authors: ZDF/Terra X/N. Bergenthal/O. Roetz/WENDEVARGA/Maximilia
