Today is Muhammad Ali's birthday. Although he's turning 72, he remains an iconic figure for his cross-cultural impact. In sport, activism, social justice, and religion, his marks are still felt to this day. Yet like with any generation-defining figure, there's more to Ali other than his major accomplishments. He was an actor, a singer, a public speaker, and a family man too. He released a song on Columbia Records, had a falling out with Malcom X, and even knocked out Superman. To dig deeper into Ali's life, read through 25 Things You Didn't Know About Muhammad Ali in GIFs.