Instant Index: Midlife Crisis in Chimps; The Myth We Use 10% of Our Brains

George Stephanopoulos reports news stories that have people talking around the world.
1:40 | 11/19/12

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Transcript for Instant Index: Midlife Crisis in Chimps; The Myth We Use 10% of Our Brains
Here's what made it to the top of our "instant index" tonight. All about facts and fiction starting with this finding from the national academy of sciences. The mid-life crisis is real. Their proof. Humans aren't the only ones who feel it. It turns out chimps do too. Scientists say like many of us they start out curious and inspired eager to climb and swing for food but when they hit THE EQUIVALENT OF OUR LATE 40s They're motivated by more status, a bit disenchanted with their youthful passion and admit it could be etched in our dna which may or may not be a handy excuse. The next time you don't seem to be firing on all cylinder. Forget the myth that we only use 10% of our brains. Those cells we don't use simply die but if you didn't know that you're not alone. The new study out today in the journal "frontiers of psychology" found 47% of teachers believed it was true and a whopping two-thirds of all americans agree. And ache take a look at this all too real video. A waterspout 140 miles outside sydney, august always the for a sense of its size and power look at that car dwarfed by that giant tornado over open waters. It lasted 15 minutes and eyewitnesses say it sounded like ten freight trains hurtling toward them. Thank goodness no one was hurt. Boy, what a terrifying sight that was. Every day we want to hear what captures your imagination so tweet us.

This transcript has been automatically generated and may not be 100% accurate.

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