Naked Scientists Special Editions

15.07.14

Loading player...
One of the key factors that makes the brain age has been uncovered by scientists in the US. Young mice infused with the blood of older animals developed a drop in their cognitive abilities. This is down to a chemical made by the immune system called beta2-microglobulin. Why it has this pro-ageing effect, we don't know; but, encouragingly, removing it reverses cognitive decline, and promotes the growth of stem cells throughout the body and brain. Chris Smith spoke to Saul Villeda and the University of California, San Francisco to find out more....
13 Jul 2015 English United Kingdom Science

Other recent episodes

Sickle cell defeated malaria and opened up pastures new

Malaria has been killing humans for at least fifteen thousand years, and our DNA still carries the scars. Ninety percent of the world's malaria cases are in Africa. But this isn't just a modern health crisis. It's written into our evolutionary history. New research from the University of Cambridge reveals…
13 Jul 8 min

Malaria in Africa

Africa remains at the centre of the global malaria crisis. The continent accounts for around 95 percent of all malaria cases, placing immense strain on health systems and costing hundreds of thousands of lives each year. In 2023, there were an estimated 249 million cases globally, with the vast majority…
20 May 10 min

Driven to End Malaria: World Malaria Day 2026

A child dies from malaria roughly every minute. A stark reminder of why urgent action is still needed. "Driven to end malaria, now we can, now we must" is the theme of this year's World Malaria Day marked on the 25th of April. But how realistic is that, and how…
26 Apr 7 min

Moths hear plants, and what fingerprints do for touch

In this episode, how kangaroos alter their postures to store more energy in their Achilles tendons and boost movement efficiency, the moths that make a beeline when they hear plants "talking" to them, tracking how people pick up diseases from their surroundings, the contribution fingerprints make to touch sensation, and…
28 Feb 37 min

Nocebos, and why the eyes of some species stay shut at birth

This month, compelling evidence for why some species keep their eyes closed for sometimes several weeks after birth, scientists prove that the "nocebo" effect is more potent than a placebo, researchers report what happens when fish eggs and mouse sperm mix, the signals that cells use to measure the lengths…
30 Nov 2025 40 min
All episodes