Notebook
- Animals
Sperm on a stick for springtails
Many males of the tiny soil organisms sustain their species by leaving drops of sperm glistening here and there in the landscape in case a female chooses to pick one up.
- Physics
Transfixing tetrahedrons
Dervishes are Sufi Muslims who represent the revolving heavens with their spinning dance.
- Tech
Jellyfish-like flying machine takes off
Mimicking sea creatures instead of insects leads to better hovering, scientists find.
- Astronomy
“Black holes” in space
Science News Letter was the first publication to use the term in print in 1964.
- Animals
Flightless birds face extinction
New Zealand’s flightless birds have limped through the last few decades, but conservation efforts have had some success.
- Plants
Kleptoplast
A cellular part such as a light-harvesting chloroplast that an organism takes from algae it has eaten.
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- Genetics
Top genomes of 2013
Scientists continue to decode the genetic blueprints of the planet’s myriad flora and fauna.
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- Environment
World’s worst polluted
A new report by Green Cross Switzerland and the Blacksmith Institute lists places posing the greatest risk to human health.
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