Uncategorized
- Health & Medicine
Male circumcision tied to lower HIV prevalence
Clinical programs in eastern and southern Africa also seem to be changing people’s views on the operation.
- Earth
External ills imperil tropical reserves
Impacts just outside park boundaries cause ecosystems within to decline.
- Humans
Altruistic kidney donors help many
Mass exchanges result in more kidneys for difficult-to-match recipients.
- Earth
Night lights may foster depression
In animals, chronic dim light triggers brain changes that disappear with the return of nightlong darkness.
- Space
Crowd sourcing comes to astronomy
Researchers comb the Internet for snapshots of a comet and use the collected images to calculate its orbit.
- Life
Polar bears’ ancient roots pushed way back
Full genetic blueprints suggest the animals split from brown bears millions of years ago.
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- Animals
Tiny creature, giant sperm
Giant sperm appear in various other species, including some flatworms, beetles and a fruit fly species, Drosophila bifurca, with sperm nearly 6 centimeters long.
- Life
Fake jellyfish so real it even swims
Constructed of silicone and heart cells, medusoid moves like the real thing.
- Life
Little animals spread sperm for smelly mosses
Sex-specific odors may entice springtails to kick off fertilization.
- Math
Test decodes dolphins’ math skills
Dolphins could use mental math to locate prey in clouds of bubbles.
- Health & Medicine
Sperm analyzed, one by one
A close look at the sex cell’s DNA reveals basic molecular processes.
