A blind American man taught himself to navigate using echolocation. His hobbies include hiking and mountain-biking, and he has now trained over 500 students in his ‘tongue-click’ technique.
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Between 2007 and 2012, Bill Gates gave away $28 billion; saving 6 million lives.
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Steven Callahan spent 76 days at sea while he drifted 1,800 perilous miles across the Atlantic in a rubber raft, battling starvation, thirst, sharks and storms. He later became the technical adviser for the acclaimed movie Life Of Pi.
15
A young programmer offered a homeless man the choice between $100 cash or coding lessons. Leo Grand chose the lessons, and now his first mobile app is available to download for $.99.
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