Mass Magnetics

[James Sinka - Boston & SF @jamessinka]

Excited to introduce @ReactorfieldAI Cohort 1:

@merge - brain-computer interfaces with no implants, $250M seed led by OpenAI and Bain

@episteme - a new R&D institution, cofounded by Louis Andre and Sam Altman

@RetroBio_ - unicorn longevity startup, adding 10 healthy years to human life. In phase 1 trials

@NorthwellHealth - NY's largest healthcare system, with Chief Biotech Officer @itchdoctor

@StrandTx - programmable mRNA medicines out of MIT, lead cancer drug already in patients

@MayoClinic - turning leading clinical science into new ventures represented by @vera_mucaj

@xiliotx - publicly traded biotech making cancer therapies to activate inside tumors

@marathonfusion - producing the world's most valuable isotopes from compact fusion reactors

@KopraBio - viruses that turn cancer cells into factories for their own destruction

@radifymetals - hydrogen-plasma reactors that turn rare-earth oxides directly into metal

@FoundationManf - rapid domestic CNC machining for frontier hardware

@MassMagnetics - US-made high-performance magnets from recycled rare earths

@algabiosciences - turning cattle methane into calories, peer-reviewed cuts of up to 63%

@lumehealth - building a wearable that measures cortisol continuously from sweat

@liu_liu_lemon - smart materials for med tech and robotics, @Harvard PhD, Fulbright Fellow

[Y Combinator @ycombinator]

Rare earth magnets sit inside nearly every electric motor, but 90% of the material is conventionally thrown away.

Mass Magnetics (S26) is recycling magnets from EV motors into new ones for robotics and defense, avoiding much of the capital-intensive refining required by mining.

[lepton @metalscontent]

We’re building the ASML of magnetic metallurgy to make America the robotics center of the universe.

https://t.co/EHTmZQYlCa

[James Sinka - Boston & SF @jamessinka]

AI transformed coding, science is next

@ReactorfieldAI makes scientists and deep tech startups AI-native

Built by me and @berkbuilds to accelerate science with frontier AI

[Zenno Astronautics @zennospace]

“I hope you’re gonna do magnets. Somebody out there, I hope, you’re all brilliant people, magnets. Do magnets, okay? I’ll tell you how to make money. Do magnets. You’re doing a lot of great stuff, do magnets. Because one thing we don’t have, but we’re getting close, but do magnets.”