• Retro Biosciences is a longevity startup backed by OpenAI's CEO, Sam Altman. • Retro's said its first human clinical trial is set to launch by the end of 2025. • It's for a pill designed to clear out "gunk" in the brain and reverse Alzheimer's.

I've just hopped on a video call with the CEO of Retro Biosciences, the Sam Altman-backed longevity company, when I mention it's quite hot.

Joe Betts-LaCroix takes my passing comment as a cue to muse on the wonders of air conditioning, and how energy and heat were once synonymous — until they weren't.

As a multi-hyphenate scientist, entrepreneur, and once-inventor of the world's smallest computer, Betts-LaCroix is excited by paradigm change.

At the helm of what is essentially Altman's playground for experimenting with pushing the limits of

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