Enlarge / New research hints at how psychedelics can trigger rapid, lasting change.wildpixel/Getty Images The human brain can change—but usually only slowly...
Enlarge / This microscopy image shows a cytotoxic T cell (blue) attacking a cancer cell (green) by releasing toxic chemicals (red).Alex Ritter, Jennifer Lippincott...
Enlarge / The Bali myna is an endangered and protected bird species bred by several conservation societies to preserve its population in the wild.Johannes...
One heart doctor explains that usually when a healthy athlete experiences sudden cardiac arrest, the cause is one of two more common conditions. WASHINGTON...
