Scientists are having a hard time agreeing on when, where and—most important—how life first emerged on the earth
A grassroots movement touts hemp's environmental virtues
When identical twins are not identical
New observations favor a younger age for the cosmos
A "controversy" over bees' dance language resurfaces
New data suggest a solution to the solar-neutrino problem
A toxic toad gets licked, boiled, teed up and tanned
Most Americans favor it, but what purpose does it serve?
Updates on four dubious but enduring theories
This devastating illness remains profoundly mysterious
An old proposal for legal spying gains new life
A word (or two) about linguist Noam Chomsky
Did the father of fractals "discover" his namesake set?
Studies disprove claims about abortion's dangers
A look at the evidence justifying illicit-drug tests
A legendary spy plane is brought down to earth
Obstacles to the disposal of nuclear waste proliferate
Unicyclist, juggler and father of information theory
Is entropy the driving force behind this odd form of matter?