Study casts doubt on whether adult brain’s memory-forming region makes new cells

In stark contrast to earlier findings, adults do not produce new nerve cells in a brain area important to memory and navigation, scientists conclude after scrutinizing 54 human brains spanning the age spectrum. The finding is preliminary. But if confirmed, it would overturn the widely accepted and potentially powerful idea that in people, the memory-related […]

Website invites you to probe a 3-D human brain

In movies, exploring the body up close often involves shrinking to microscopic sizes and taking harrowing rides through the blood. Thanks to a new virtual model, you can journey through a three-dimensional brain. No shrink ray required. The Society for Neuroscience and other organizations have long sponsored the website BrainFacts.org, which has basic information about […]

Astronomers can’t figure out why some black holes got so big so fast

The existence of supermassive black holes in the early universe has never made much sense to astronomers. Sightings since 2006 have shown that gargantuan monsters with masses of at least a billion suns were already in place when the universe was less than a billion years old – far too early for them to have […]

A single atom can gauge teensy electromagnetic forces

ZeptonewtonZEP-toe-new-ton n.A unit of force equal to one billionth of a trillionth of a newton. An itty-bitty object can be used to suss out teeny-weeny forces. Scientists used an atom of the element ytterbium to sense an electromagnetic force smaller than 100 zeptonewtons, researchers report online March 23 in Science Advances. That’s less than 0.0000000000000000001 […]