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Why a day is 24 hours long, and why it used to be 20 hours
Learn why on Earth a day is 24 hours long, how it used to be closer to 20 hours long, and how a warming atmosphere might extend the length of a day.
July 7, 2023
Did we find life on Mars … and then wipe it out?
Did the Viking landers from a few decades ago find microbial life on Mars after all? Astrobiologist Dirk Schulze-Makuch makes the case in Big Think.
July 6, 2023
Flying car gets airworthiness certificate from FAA
The FAA has granted an airworthiness certification to a flying car developed by Alef Aeronautics. The company envisions a car that rises above traffic jams.
July 6, 2023
Satellite views lightning from space to help predict storms
The European Space Agency has a new satellite that is capturing views of lightning from space. The satellite will help improve forecasts and make air travel safer.
July 5, 2023
99% of the world’s population in sunlight July 8 … and other dates
Fact-checkers at timeanddate.com discovered 99% of the world's population experiences some sunlight at 11:15 UTC on July 8 ... along with many other dates!
July 4, 2023
July supermoon photo gallery from our readers
Enjoy these great photos of the July supermoon. It's the first of four supermoons in a row. August will have two supermoons and September will have one.
July 4, 2023
Could there be a captured planet hiding in the Oort Cloud?
Is there a rogue captured planet way out in the Oort Cloud of our solar system? A team of researchers says there is indeed a slim possibility.
July 2, 2023
Young Jupiter-like exoplanet revealed in new images
Astronomers using the Keck II telescope in Hawaii have obtained new direct images of a young exoplanet 3 times the mass of Jupiter and 87.5 light-years away.
July 2, 2023
Circumhorizon arc or iridescent cloud?
It's easy to confuse a circumhorizon arc with an iridescent cloud, and vice versa. Circumhorizon arcs are more commonly seen at this time of year.
July 1, 2023
1st Saturn image from Webb highlights glowing rings
Webb has taken its 1st Saturn image! This infrared view shows Saturn's rings shining bright in a golden light. You can also spot some of Saturn's moons.
July 1, 2023
