The Virgin billionaire starts a bank for umbilical blood; a deposit costs only $3,000.
A proposed engine design approaches the efficiency of gas-electric hybrids, but could be far cheaper.
3-D x-ray videos of species in motion will help scientists understand how they evolved.
A 15-nanometer-thick porous silicon membrane could lead to microfluidics filters and make protein purification and blood dialysis more efficient.
Steve Jobs calls on the music industry to drop its use of digital rights management software.
Can an experimental technique using transplanted fetal cells help paralyzed patients? Probably not. But a doctor in China is forging ahead anyway.
We know where we must go eventually: toward a sustainable energy infrastructure. Why not head there now?