A rare degenerative brain disorder made it impossible for this man to see the numbers 2 through 9.
Space Perspective aims to send paying customers and payloads to the stratosphere in its Spaceship Neptune, a balloon-borne capsule that's scheduled to make its first test flights early next year.
Genetic analysis suggests why young and otherwise healthy people who developed COVID-19 sometimes experienced severe respiratory symptoms.
Atmospheric scientists sampled the most pristine air on Earth, just above the Southern Ocean. They found some surprises.
A "ring of fire" solar eclipse will briefly appear in parts of Africa and Asia this weekend, and if you aren't out there in person, you can take in the spectacular show online.
An annular eclipse and the summer solstice are both happening this weekend. But don't worry, it's not the end of days.
For the past few years, the possibility of a new (and big!) planet hanging around in the far outer solar system has tantalized scientists and the public alike. Is "Planet Nine" out there or not?
In this special episode of Life's Little Mysteries, we'll give you the latest news and answer frequently asked questions about the new coronavirus and COVID-19.
When an adult male gorilla in a South African zoo developed breathing problems, wildlife specialists diagnosed the ailment with CT scans.
A strange balloon-shaped 'UFO' appeared and disappeared over the city of Sendai, Japan on Wednesday (June 17).