Ali was stripped of his world title and sent to jail for his refusal to fight in the Vietnam War. On his return, he was faced with the indestructible George Foreman and knocked him out in the eighth round.
But in 1978 his crown was taken again by Leon Spinks. But a rematch left no doubt as to who was 'The Greatest' and Ali regained his title.
Scientists are appealing for more people to donate their brains for research after they die.
Life on Earth may have arrived from Mars on an asteroid, scientists have claimed.
Lunar mission scheduled at the end of 2017 could find out if beer can be brewed on the moon.
A bottle used to teach children how far litter can travel ended up on Scottish beach after 8,700-mile journey.
Confused Apple customers are finding coins in their MacBooks.
High levels of iron help prevent hearing loss, a study has claimed.
A software engineer has constructed a fingernail-sized engine made of paper and it totally works!
Conspiracy theorists claim that there is a mysterious alien based pyramid in the Antarctic.
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