As we age, muscles shift toward slow-twitch fibres even as their mitochondria falter. A Copenhagen-led study in mice suggests this is a defence, not just a failure.
A tiny group of brainstem neurons helps keep blood pressure stable from moment to moment. Losing them destabilises it, even when the average reading looks normal.
NASA's Astronomy Picture of the Day for 26 October 2026 shows M42, the Great Nebula in Orion. Here are the facts about this stellar nursery that are worth knowing, from how to spot it without a telescope to why its distance and size depend on who you ask.
Astronomers using the James Webb Space Telescope have found evidence for three actively feeding supermassive black holes in a single galaxy seen about 1.2 billion years after the Big Bang. Two sit close together at the center, and may merge within a few hundred million years.
For years, large trials found that low-dose aspirin does not prevent dementia in older adults overall. A new analysis of the ASPREE trial suggests the average may be hiding a subgroup defined by genes linked to platelet count - but the same group also bled more.
NASA's Astronomy Picture of the Day for October 22, 2026 shows the first known green star: a white dwarf whose sodium-rich atmosphere would give it a chartreuse glow up close.
Researchers at Texas A&M found that excess RNA, including ordinary messenger RNA, can damage mitochondria and cut a cell's energy production during poxvirus infection.
Some people carry the strongest common genetic risk factor for Alzheimer's and stay mentally sharp into their 80s. New research from Columbia University points to fibronectin and the brain's blood-brain barrier as part of the explanation.
A randomized, double-blind phase 2 trial tested daily oral vitamin C in people with pre-cancerous blood disorders and early-stage blood cancers. Here is what researchers found, and why a larger trial is still needed.