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Debate over Alzheimer’s enzyme flares up
Scientists continue to tussle over the identity of an enzyme implicated in Alzheimer's disease.
By John Travis - Earth
Algal bloom is smothering Florida coral
The anomalous growth of a native alga—now blanketing the seabed in a huge swath off the southern coast of Florida—points to overfertilization with upwelling sewage.
By Janet Raloff -
Cancer patients accentuate the positive
Group therapy that promotes positive types of personal growth in breast cancer patients may also result in beneficial physiological changes.
By Bruce Bower - Agriculture
Bt corn variety OK for black swallowtails
The first published field study of butterflies and genetically altered corn finds no harm to black swallowtail caterpillars from a common corn variety.
By Susan Milius - Health & Medicine
Keeping the beat
Muscle cells taken from embryonic rats and put into an adult rat's heart can transmit the electric signals that govern the heartbeat.
- Tech
Robotic heart surgery
By using robotic rather than conventional open-heart techniques, doctors can perform heart surgery with smaller incisions, giving patients less pain and speeding recovery.
- Health & Medicine
Enzyme Shortage May Lead to Lupus
Without the enzyme DNase I, mice are vulnerable to symptoms of lupus, a debilitating autoimmune disease.
By Nathan Seppa - Math
Five-Suit Decks, Traffic-Jam Puzzles, and Other Treats
Tired of playing the same old card games with the same old cards? One option is to expand the deck to include five suits instead of just four. To solve this difficult Rush Hour puzzle, you must move vehicles out of the way to permit the red car to exit at right. The best known […]
- Health & Medicine
Cycling and surgery have similar effect
Among people with chest pain because of clogged heart arteries, regular exercise on a stationary bike reduced symptoms better than surgery did.
- Health & Medicine
A hot new therapy?
Spending time in a sauna improves heart function in people with chronic heart failure.
- Planetary Science
Seeing Saturn
After 5 years of interplanetary travel, the Saturn-bound Cassini spacecraft has taken its first picture of the ringed planet.
By Ron Cowen - Health & Medicine
Protein may signal heart problems
A protein already linked to inflammation is also a strong predictor of heart problems.
By Nathan Seppa