Technical progress has encouraged a new batch of companies to jump in on the promise of profits from humanoid robots. And they're all Chinese automakers.

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Tesla's solar roof was an experiment that never really caught on for the company. But does that mean the concept of roof-integrated solar is dead?

Tesla and eight other automakers will install warning labels that help occupants identify the often hard-to-find manual door releases.

Together, these permits would allow up to 8,000 robotaxis to be deployed over the next 12 months.