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October birthstone: Colorful opal and tourmaline
Take your pick: the October birthstone is either the striking iridescent opal or the many-colored tourmaline. Learn the lore of these pretty gemstones here.
October 1, 2024
Biobots are a 3rd state between life and death
Biobots are tiny, multicellular robots powered by living cells to perform tasks, and they're a third state between life and death.
September 29, 2024
Hurricane Helene made landfall in Florida as a Category 4
Hurricane Helene hit Florida as a category 4 storm near Perry. The storm surge has washed away homes and winds have caused power outages. More here.
September 27, 2024
Will you see colors in aurora? Or do you need a camera?
If you live below 50 degrees N. latitude, any aurora visible is likely to be low on your horizon, and you're less likely to see vivid colors.
September 26, 2024
SKA telescope gets its ‘1st fringes’
The SKA telescope SKA-Low has successfully measured a correlated signal using 2 of its stations. Astronomers call such a measurement "1st fringes."
September 24, 2024
Did humans drive Cyprus dwarf hippos and elephants extinct?
A new study shows that now-extinct dwarf hippos and elephants on the island of Cyprus were likely driven to extinction by humans about 14,000 years ago.
September 22, 2024
Equinox shadows trace a straight line from west to east
Equinox shadows are unique. On this day - and only this day - the tip of an upright stick's shadow follows a straight path, west to east, all day long.
September 21, 2024
Did social isolation drive Neanderthals to extinction?
New DNA studies of a Neanderthal from France support a theory that Neanderthals became extinct because their populations were isolated, leading to inbreeding.
September 18, 2024
LIVE MONDAY: Space junk with Jonathan McDowell
Astrophysicist Jonathan McDowell will discuss humans' unexpected impacts on space LIVE with EarthSky at 12:15 p.m. (17:15 UTC) on Monday, September 16. Join us!
September 15, 2024
Happy Friday the 13th: It’s the 1st of 2 in 2024
When a year with 366 days starts on a Monday, it's inevitable Friday the 13th will occur twice. In 2024 Friday the 13th comes in September and December.
September 13, 2024
