All Stories by John Travis
-
Egg’s missing proteins thwart primate cloning
Scientists have identified a reason why cloning a person may be difficult, if not impossible.
-
Genetic Clue to Aging? Mutation causes early-aging syndrome
A gene defect that causes accelerated aging may provide insight into normal aging.
-
Moving On: Now the human genome is really done
An international consortium of scientists announced that the deciphering of the human genetic code is now truly complete.
-
Happy Anniversary
In the 50 years since the discovery of DNA's double helix structure, scientists have developed striking new ways to visualize the molecule.
-
Putting Out the Welcome Mat: Chemical guides germ cells to gonads
A chemical made in the gonads attracts the embryonic cells that will one day form eggs or sperm.
-
Autism Advance: Mutated genes disrupt nerve cell proteins
Two gene mutations that cause autism suggest that nerve cell connections called synapses are key to the disorder.
-
Sperm show age
The quality of a man's sperm declines as he gets older.
-
Human RNA genes counted up
People possess about 250 genes that encode short RNA strands rather than DNA.
-
By a Nose? Human sperm may sniff out the path to an egg
A man's sperm appear to possess a primitive kind of nose that enables them to navigate to a woman's egg by scent.
- Health & Medicine
Protein protects rat brains from strokes
Neuroglobin, a protein related to hemoglobin, may protect the brain during strokes.
-
A Tale of the Tapeworm: Parasite ploy suggests drug-delivery tactic
A chemical used by tapeworms to slow intestinal pulsations may help people absorb drugs more efficiently.
-
Discovery of bitter-taste gene is sweet
Scientists have found that variations in a gene explain why people differ in their ability to taste bitterness.
