Life
- Ecosystems
Coastal dead zones expanding
The number of coastal areas known as dead zones is on the rise. A new tally reports more than 400 of the oxygen starved regions worldwide.
- Life
Bacteria use poison to make food
Bacteria from Mono Lake conduct photosynthesis with arsenic, a form of the process that may be a relic of life on Earth before the advent of an oxygen atmosphere.
- Life
H9N2 avian flu strain has pandemic potential
Just one change in a strain of avian flu virus makes it transmissible by direct contact in ferrets, but the virus still lacks the ability to spread by airborne particles.
- Plants
Bittersweet fruits
A new study provides strong evidence that fruits harm predators with the same chemicals that, for example, give chili peppers their spice.
- Health & Medicine
Running interference on cholesterol
Injected RNA molecule lowers LDL in rats and monkeys.
- Life
Humans aided, constrained by fossil fuels
Maintaining long-term population will require alternate energy sources.
- Life
DNA defense
Scientists find a type of white blood cell releases its mitochondrial DNA, along with toxic proteins, as a defense against invading bacteria.
- Life
Beetles hear the heat
Researchers verify fire beetles have a pressure vessel that enables them to sense intense heat.
- Life
Making T cells tougher against HIV
Delivering small interfering RNAs, or siRNAs, to human immune cells in mice protects the cells from HIV and suggests future therapy for patients.
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- Life
Eat less, weigh more
Separate neurons in the nematode brain control eating and fat-building. The discovery may help explain some mysteries of obesity.
- Life
Time to chill
Well-preserved fossils deposited in an Antarctic lake about 14 million years ago pin down when a large part of the now-icy continent most recently dipped below freezing.
