All Stories by Tina Hesman Saey
- Life
Heart has cellular regeneration ability
In mice, injecting a protein spurs the organ’s own stem cells to regrow small amounts of tissue after damage.
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- Life
Holding back evolution
Gene mutations that are beneficial on their own combine to slow down progress, new bacterial experiments show.
- Life
Mellow corals beat the heat
Species that overreact to distress signals from algae are more likely to succumb to warming.
- Life
Suspect bacterium may trigger Parkinson’s
A study in mice shows that H. pylori, the microbe that causes stomach ulcers, may also affect the brain.
- Life
Body attacks lab-made stem cells
In mice, the immune system targets and destroys reprogrammed adult skin cells, raising questions about their medical potential.
- Humans
‘Bonding hormone’ linked to post-baby blues
Low oxytocin levels in pregnant women may help predict whether they will have postpartum depression.
- Life
Sickle-cell may blunt, not stop, malaria
Once thought to keep parasite out of cells, the trait appears to diminish the severity of infection.
- Life
Half-asleep rats look wide awake
In a discovery with ominous implications for sleep deprivation, researchers find that some brain regions can doze off while an animal remains active.
- Life
Gut bacteria come in three flavors
Everybody has one of a trio of types — and which one seems to be less important than how the bugs behave.
- Life
New light on moths gone soot-colored
Researchers trace the mutation that led to the dramatic darkening of an insect's wings during England's industrial revolution to a region rich in genes that control color patterns.
