Today’s tulip trees carry similar mitochondrial DNA as those that grew in the time of the dinosaurs.
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The Nutshell
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Living fossils not so fossilized; Canadian gov’t threatens scientists’ freedom to speak and publish; gene therapy for sensory disorders; an unusual theory of cancer; clues for an HIV vaccine
Nanoparticles coated with a toxin found in bee venom can destroy HIV while leaving surrounding cells intact.
Three Silicon Valley entrepreneurs are offering $3 million to scientists demonstrating excellence in biology and medical research.
The small organ evolved too many times for it to be an accident, but it’s still unclear what it does.
A small insect-eating animal is the common ancestor of whales, elephants, dogs, and humans.
One of the most advanced tuberculosis vaccines has failed to protect infants from getting the disease in a clinical trial, but it may be effective in adults.
A company offering experimental stem-cell treatments will carry out its procedures in Mexico after the FDA warned that it would need approval to operate in the U.S.
Bamboo sharks still developing in their egg cases respond to a predator presence by ceasing movement and even breathing.
A drug applied to the ears of deaf mice has prompted the regrowth of noise-damaged hair cells and resulted in slight improvements in the animals’ hearing.
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