AI & Tech

The UV-tracking Gem made me rethink how sunlight affects my health, not just my appearance

Around the same time, I received a notification from an app used by the $249 ($149 at the time of publication) UV-tracking necklace I'd been wearing, called Gem, from a company called The90.

✦ Extractive summary — built from the sources' own reporting•From 1 source•1 min read•Updated November 7, 2026, 5:00 PM UTC
Key points
  • So I sat beneath a patio umbrella with a powerful fan nearby, figuring I was protected from the sun and heat.
  • It turns out UV radiatio … Read the full story at The Verge.

With temperatures rising to the 90s in Los Angeles, avoiding the heat wasn't exactly an option while I was at a relative's outdoor party in August.

Half an hour later, I felt exhausted, dizzy, nauseous, and generally unwell, symptoms consistent with heat exhaustion.

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