Science
How vaccines train the immune system to remember a threat
Vaccines show the body a harmless preview of a pathogen so it builds antibodies and memory cells before a real infection arrives.
Section
Science
Discoveries, research and the people expanding what we know about the universe.
Science
What CRISPR gene editing can — and can’t — do
CRISPR lets scientists cut DNA at a chosen spot with unusual ease, but precision, delivery and ethics still bound what it can safely achieve.
Science
Why the night sky is dark, and what telescopes really capture
If the universe were infinite and eternal, the night sky would blaze. Its darkness is a clue about cosmic age, light's finite speed, and expansion.
