A laser beam passing through a crystal can suddenly burst into a spray of light. This photorefractive effect may be the key to developing computers that exploit light instead of electricity
Even when fathers and mothers contribute identical genes to their offspring, the genes may have different effects. Sex-specific gene imprints may influence normal development and trigger diseases
Oceanographers are using principles analogous to medical X-ray tomography to obtain three-dimensional images of ocean currents and temperatures
A twofold treatment brings together boron and neutrons to create a lethal radiation that can attack tumor cells without damaging normal tissues in the process
Accumulating evidence suggests an asteroid or comet caused the Cretaceous extinction
What dramatic event 65 million years ago killed most species of life on the earth? The author argues it was a massive volcanic eruption
In the 40 years since this magazine published the original prospectus for a chess computer, machines have vanquished first novices, then masters and now grandmasters. Will Gary Kasparov be next?
- Amateur Scientist