Only late-stage human trials can show that a vaccine is both safe and effective.
In less than 48 hours, the last intact ice shelf in the Canadian Arctic collapsed, losing more than 40% of its mass.
The bubble of charged particles that surrounds our solar system looks more like a deflated croissant than a comet, as traditionally envisioned, a recent study suggests.
A groundbreaking heart transplant in Virginia in 1968, one of the first in the world, was performed using the heart of a Black patient that was taken without his family's knowledge.
Authorities finally identified the culprit responsible for the mysterious disappearance of dozens of shoes from a German neighborhood.
The microbes had been dormant below the ocean floor for eons, buried since the time of the dinosaurs. Then a team of scientists in Japan woke the little organisms up.
Here are the stories behind the most amazing images in the world of science this week. A recap of the coolest photos featured on Live Science.