Thrilla in Manilla. Rumble in the Jungle. The attitude. Muhammad Ali looked immortal in his peak, but his recent appearances reminded us he was the exact opposite. He's been battling Parkinson's Disease for decades, and earlier, his brother Rahman Ali said The Greatest may not make it until the summer. He told the Daily Mail Muhammad could even be dead within days.

It looked like Ali was near the end of his rope for the past year, as he looked particularly emaciated in his appearance at the London Olympics (see the second thumbnail). He was also treated for dehydration at his Arizona estate, according to the article.

As sad as this news is, Rahman did make a very interesting point that put Ali's life into perspective: "You know the word "infinite"? That's Ali, he's infinite. His name will last forever."

RELATED: The 50 Cockiest Athletes of All Time

[via Daily Mail]