Oklo said Tuesday that OpenAI CEO Sam Altman was stepping down as chairman of its board and indicated a partnership with the artificial-intelligence company could be on the horizon. Altman, who has served as chairman since 2015,

Altman’s resignation opens up the opportunity for future deals between OpenAI and the nuclear-energy startup. Oklo shares fall after hours.

We don’t know how Altman is spending the day, though it’s likely a low-key affair. Altman and his husband welcomed a baby just two months ago, which may mean more lullabies than headlines tonight. Still,