Apu Gomes via Getty Images; Brendan Smialowski/AFP via Getty Images
- Elon Musk says he's still open to fighting Mark Zuckerberg.
- "I've offered to fight him any place, any time, any rules, but all I hear is crickets," Musk said.
- The mercurial billionaire brought up the fight a day after Zuckerberg's 40th birthday on Tuesday.
Forget regular birthday presents like socks or a fun mug. Turns out, if you're Elon Musk, the biggest birthday present you can gift to a tech world nemesis may just be yourself.