The ongoing Elon Musk-Jeff Bezos rivalry may be spilling into robotics.
Catch up quick: Bezos recently led a $400 million financing round into Physical Intelligence, an AI startup focused on powering robots.
He's also put money into humanoid robot startup Figure.
Zoom out: Both investments come at a time when Musk has been more focused on selling a vision of Tesla's future based on personal humanoid robots sitting with families at kitchen tables than on making cheap electric vehicles.
The big picture: The billionaires have been needling each other over their respective space ambitions for about two decades.