
Sometimes, What We "Know" Isn't Actually True
A solar eclipse, dark matter and the cautionary tale of the planet that wasn’t there
Robert P. Kirshner is the Clowes Research Professor of Science at Harvard University and the Chief Program Officer for Science at the Gordon and Betty Moore Foundation. A former director of the University of Michigan Observatory, and a member of the National Academy of Sciences, he was awarded the 2014 James Craig Watson medal by the National Academy of Sciences for his role in the discovery of cosmic acceleration.

Sometimes, What We "Know" Isn't Actually True
A solar eclipse, dark matter and the cautionary tale of the planet that wasn’t there

Science in Turbulent Times
Nobody wants to act like just another special interest—but science is for the long term good of the nation, not just the scientists.

Surveying Spacetime with Supernovae
Exploding stars seen across immense distances show that the cosmic expansion may be accelerating-a sign that an exotic new form of energy could be driving the universe apart

Surveying Space-time with Supernovae
Exploding stars seen across immense distances show that the cosmic expansion may be accelerating--a sign that the universe may be driven apart by an exotic new form of energy

The Earth's Elements
The elements that make up the earth and its inhabitants were created by earlier generations of stars