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Welcome to The Frontier File

Published Wednesday Afternoon. Subscribers get early access at 6am Monday every week.

Deep dives on AI, quantum, eVTOL, space, advanced materials, medical technology and more.

Jeff Hubbard 8/5/26 Jeff Hubbard 8/5/26

Three Companies Got Big July News. One Comes With a Deadline.

Radiant Nuclear's delayed test bed quietly held its schedule. Deployable Energy landed…

Jeff Hubbard 6/29/26 Jeff Hubbard 6/29/26

The battery industry is splitting into two tracks: sodium and iron‑air for the grid, and solid‑state lithium for electric vehicles…

5/8/26 5/8/26