Defense tech has become one of venture capital's hottest sectors, after being ignored for decades, but it just lost a top evangelist within the Pentagon.
Vibes check: Defense-tech investors tell Axios that they're concerned and disappointed, but not slowing down.
Brain implants like those being developed by Elon Musk's Neuralink are becoming the latest friction point in the intensifying U.S.-China rivalry in the life sciences.
Why it matters: The devices are bringing new hope to patients with strokes, Parkinson's disease and other neurological conditions. And tech billionaires have fueled advances by pouring billions into biotech startups focused on linking the brain with computers.
