The Midlife Crisis of the CosmosAlthough it is not as active as it used to be, the universe is still forming stars and building black holes at an impressive pace
Immunity's Early-Warning SystemThe innate immune response constitutes the first line of defense against invading microbes and plays a role in inflammatory disease. Surprising insights into how this system operates could lead to new therapies for a host of infectious and immune-related disorders
Eye of the BeholderWonders under the lens of the optical microscope
Exploding the Self-Esteem MythBoosting people's sense of self-worth has become a national preoccupation. Yet surprisingly, researchshows that such efforts are of little value in fostering academic progress or preventing undesirable behavior
Considerate ComputingDigital gadgets demand ever more of our attention with their rude and thoughtless interruptions. Engineers are now testing computers, phones and cars that sense when you're busy and spare you from distraction
Capturing a Killer Flu VirusThe deadliest flu strain in history has been resurrected. What can the 1918 virus reveal about why it killed millions and where more like it may be lurking?
Best-Kept SecretsQuantum cryptography has marched from theory to laboratory to real products
50, 100 & 150 Years Ago
Personality Clash War Worries Heavenly Revolutions
Shaky Gravity Boost
Face Painters, Begone!
Eyeing Stem Cells
Through Titan's Haze
Snaking Its Way In
By the Numbers
Nurses in Short Supply
Letters to the Editors
How Are the Mighty Fallen?