News
- Space
Existence of habitable exoplanet questioned
A Swiss team has failed to confirm what has recently been claimed to be the first planet outside the solar system that might be right for life.
- Chemistry
Guards of the blood-brain barrier identified
Specialized cells called pericytes are crucial to protecting the central nervous system, two new studies demonstrate.
- Life
More than a chicken, fewer than a grape
A decade after the completion of the Human Genome Project, the exact number of human genes remains elusive.
- Space
CSI: Asteroid Belt
Astronomers hunt clues in the rubble of a recent collision between two space rocks.
