Jess Hamzelou

@jesshamzelou.bsky.social

Senior reporter at MIT Technology Review. Previously at New Scientist. Knight Science Journalism fellow '24. Health, biomed and biotech. She/her. Signal: jess_hamzelou.01

Scoop for the weekend: Scientists have managed to keep a human uterus alive outside of the body for a day - a first. They want to learn more about the very first stages of pregnancy... and potentially gestate a human. www.technologyreview.com/2026/03/28/1...

A woman’s uterus has been kept alive outside the body for the first time

The team behind the feat plan to study uterine disorders and the early stages of pregnancy—and potentially grow a human fetus.

technologyreview.com

A scoop: DHS is using AI video generators from Google and Adobe to make content shared with the public. It comes as workers in tech have put pressure on their employers to denounce the agency's activities. www.technologyreview.com/2026/01/29/1...

DHS is using Google and Adobe AI to make videos

Immigration agencies have been flooding social media with bizarre, seemingly AI-generated content. We now know more about what might be making it.

technologyreview.com

There's a group of people who believe death is humanity's core problem. Meet the Vitalists: the hardcore longevity enthusiasts who want to spark a longevity revolution. "Without a revolution, we're as good as dead," cofounder Adam Gries told me. www.technologyreview.com/2026/01/29/1...

Meet the Vitalists: the hardcore longevity enthusiasts who believe death is “wrong”

They argue we need a revolution—and more and more influential scientists, funders, and politicians are taking them seriously.

technologyreview.com

The Washington Post reports that Jim O'Neill will replace Susan Monarez as head of the CDC. O'Neill is a longevity enthusiast who has supported deregulation of drugs and the idea of creating new jurisdictions at sea. Here's my recent profile: www.technologyreview.com/2025/06/30/1...

Meet Jim O’Neill, the longevity enthusiast who is now RFK Jr.’s right-hand man

The newest addition to Trump’s health agency wants to create new cities in the sea, extend human lifespan, and Make America Healthy Again.

technologyreview.com

When Joyce Esser, who has motor neuron disease, used her AI voice clone to tell her husband to "get his arse in gear," she was temporarily banned from using it. Should tech companies be screening or limiting what people like Joyce can say? www.technologyreview.com/2025/02/14/1...

A woman made her AI voice clone say “arse.” Then she got banned.

People with motor neuron disease should be allowed to say whatever they want, including “arse” and “knickers.”

technologyreview.com

Humanlike "teeth" have been grown in mini pigs Researchers mixed human and pig tooth cells and grew them in the lab, then implanted them into the jaws of living mini pigs. They formed little bioengineered teeth! Goal is to make replacement teeth for ppl www.technologyreview.com/2025/02/06/1...

Humanlike “teeth” have been grown in mini pigs

The toothlike structures represent a step toward bioengineered replacements for dental implants, say researchers behind the work.

technologyreview.com

Scientists! Health professionals! If you and/or important research/programs are being affected by executive orders, memos and directives being issued under the new administration, please get in touch. You can reach me securely via Signal at jess_hamzelou.01

We're creating more IVF embryos than ever, and millions of them are ending up frozen in suspended animation for years or decades. Some will be used to start pregnancies, or donated for research. But many of them will be stuck in limbo. Indefinitely. www.technologyreview.com/2025/01/13/1...

Inside the strange limbo facing millions of IVF embryos

Frozen embryos are filling storage banks around the world. It's a struggle to know what to do with them.

technologyreview.com

Bird flu presents a "high threat with indeterminate risk," according to a public health specialist I spoke to this week. Flu viruses have a pretty horrific track record when it comes to pandemics. In the US, H5N1 is spreading through dairy cows, there have been 66 cases confirmed in people...

Engineers can make computer models of your organs, and some doctors are already using them to decide which bits of people's hearts to burn off in surgery(!) Everything you wanted to know about digital twins (the health ones!) here: www.technologyreview.com/2024/12/19/1...

Digital twins of human organs are here. They’re set to transform medical treatment.

The models can be used to plan surgeries and in the future could be used to help trial new drugs.

technologyreview.com

Bird flu is still spreading in the US. The virus is in 675 cattle herds (that we know of), and is showing up in dairy produce. There are 55 reported cases in people so far. And we still don't even know how the virus is spreading. It's not looking great... www.technologyreview.com/2024/11/29/1...

The risk of a bird flu pandemic is rising

Human cases in the US are on the rise and the virus is turning up in cows and dairy products. Luckily, we have some vaccines ready to go if needed.

technologyreview.com

So I watched The Substance last week and feel pretty confident some of those images will be burned into my mind forever. It got me thinking about the impacts of problematic thinking about women. Especially the use of the term "women of childbearing age" www.technologyreview.com/2024/11/15/1... 🧪

Why the term “women of childbearing age” is problematic

New movie The Substance showcases how women are thought about in terms of youth and fertility. That idea makes for bad research and health guidance.

technologyreview.com