A toddler's cancer disappeared, and one bird saved a forest

So doctors at Baylor College of Medicine tried something built for exactly this kind of failure: CAR T cells engineered from the boy's own immune system, with a built-in "kill switch" in case they needed reining in 215. He got two infusions. The cancer-associated biomarker in his blood plummeted, the tumors disappeared, and a year later he remained cancer-free with no dangerous side effects, treated the whole way as an outpatient. It's one case, not a cure, and the same trial is now recruiting patients aged one to twenty-one to see whether two shots can do this again.

A Stanford Medicine study published September 18 in Nature Neuroscience found something odder. Using both mouse and human stem cells, the researchers traced two entirely separate populations of neural progenitor cells, one giving rise to the forebrain and midbrain, the other to the hindbrain, each with its own distinct chromatin landscape from remarkably early in development 125. The two lineages hold up as genuinely separate tracks, not one system that diverges late.

Locals called it a jocotoco. Ornithologist Robert Ridgely named it Grallaria ridgelyi, the Jocotoco Antpitta, and immediately went hunting for funding to buy the land it lived on 246. He got it. That single discovery seeded what's now the Jocotoco Foundation, a network of 19 private reserves covering 123,000 acres, run alongside another 200,000 community-owned acres spanning the Andes, the Amazon, the Chocó, and the Galápagos. Across those reserves, researchers have recorded 1,350 bird species, better than one in eight of all bird species alive.

The two-part system boosted the robot's speed by about 450 percent and its acceleration by about 250 percent over the lab's previous best, and it's now agile enough to pull off ten consecutive somersaults in eleven seconds while wind tries to knock it off its path 7. The framework, published in Science Advances, borrows a tradeoff real insects make constantly: how much to compute against how fast to react.

A team at the European Molecular Biology Laboratory in Barcelona tried something closer to how an animal actually builds itself. Starting from bovine embryonic stem cells, which unlike adult stem cells can multiply indefinitely, they let the cells develop together in a serum-free culture and self-organize into tissue containing skeletal muscle, nerve, and blood vessel cells at once, no scaffold or bioprinting required 220. "One of the biggest challenges in cultivated meat is reproducing the complexity of real tissue," said researcher Marina Sanaki-Matsumiya. The work, published in Nature Communications, is an early proof of concept.

In open-water trials with National Taiwan Ocean University, they attached 28 coral fragments to the printed structures. All 28 survived, and by the time testing wrapped, fish, hermit crabs, algae, and octopuses had already moved in.

A team at Zhejiang University wanted to watch it happen in living people, so they injected a contrast dye into the spinal fluid of 87 patients already scheduled for a spinal tap, then tracked it on MRI at 4.5, 15, and 39 hours afterward, measuring how much reached the marrow near the skull's major vein, the sides near the lateral fissure, and the base near the cisterna magna 112. The fluid moved slower in older patients, and slower still in those reporting poor sleep or early cognitive decline.

A team built a machine-learning model trained on published honeybee behavior data, used it to screen a chemical space of more than 50 million compounds, and surfaced over 130 repellent candidates 96. They validated those in the lab on honeybees and fruit flies, refined the model, then tested the top seven candidates on freely foraging honeybees out in an actual field. The field trial confirmed strong repellency, holding up well outside lab conditions.