Inside the nearly 8-year-long feud between Elon Musk and Mark Zuckerberg

• There's no love lost between Elon Musk and Mark Zuckerberg. 
• The CEOs have been feuding since 2016, when a SpaceX explosion destroyed a Facebook satellite.
• Here's a history of their feud.

For nearly eight years, two of tech's biggest names — Elon Musk and Mark Zuckerberg — have been caught up in a feud, clashing over topics like artificial intelligence and rockets.

The two men have been griping about each other behind closed doors for years, according to The Wall Street Journal. But the tech moguls haven't exactly kept their rivalry a secret from the public, either.