‘Reverse Mathematics’ Illuminates Why Hard Problems Are Hard
When it comes to hard problems, computer scientists seem to be stuck. Consider, for example, the notorious problem of finding the shortest round-trip route that
Category: Science
Roman sun hat: A ‘very rare’ 1,600-year-old brimmed cap that may have protected a Roman soldier from Egyptian sandstorms
A rare example of a sun hat from late Roman Egypt that was stitched together from fabrics in five colors.
What’s the difference between a newt and a salamander?
Salamanders and newts are both long-tailed amphibians, but what’s the difference between them?
The air quality industry leaders have quietly dropped the price of the Levoit 400S air purifier
Three-stage filtration system, check. Hands-free voice control, check. Reliable air quality sensor, check. 21% discount for Black Friday and Cyber Monday? Check.
Top 5 mistakes to avoid when shopping for activewear for Christmas
Shopping for running shoes and workout clothes this Cyber Monday ahead of Christmas? Here are 5 common mistakes to avoid, and what to do instead
Time may be a psychological projection, philosopher argues
Is time real, or an illusion? The best answer may be neither: Both physics and philosophy suggest that time is a projection of the mind
Scientists mapped the shape of a supernova for the first time ever – and it’s not what we expected: Space photo of the week
Astronomers using data from the Very Large Telescope (VLT) have revealed that the initial “breakout” phase of a supernova is elongated, not perfectly spherical.
Lowest prices ever on the Apple Ultra 2, Apple Watch Series 10 and Apple Watch SE smart watches for Cyber Monday
While Black Friday weekend is about to end, Cyber Monday is proving to have some impressive deals, including huge discounts on Apple watches.
These pocket-sized binoculars are a neat stocking filler for kids and adults for the holidays — and they’re less than $20 for Black Friday
The Occer 12×25 compact binoculars are small and very affordable, and for under $20, they’re the cheapest binoculars we’d recommend buying as a Christmas gift.
These Disney+, Hulu and ESPN Black Friday streaming bundles will have you fighting over the remote this festive season
Enjoy a whole host of nature, sci-fi and space exploration documentaries with this streaming deal — save up to 44% this Black Friday weekend.
Helicopter Training for Artemis Missions
NASA astronauts Matthew Dominick (left) and Mark Vande Hei (right) prepare to fly out to a landing zone in the Rocky Mountains as part of
The Nikon Z8 can “conquer any and every shooting situation” — and it’s still on sale this Black Friday weekend
If you’ve been wanting to upgrade your Z6 or Z7 for ages but have been waiting for the right time, the right time is now!
Antarctica’s Southern Ocean might be gearing up for a thermal ‘burp’ that could last a century
When humans manage to cut enough emissions and eventually reduce global temperatures, new research shows the Southern Ocean could kick warming back into gear.
Cyber Monday deal on “world-class fitness tracker”, the Garmin Forerunner 970 smartwatch just hit a best-ever price on Black Friday weekend
Get the Garmin Forerunner 970 for $100 less; this smartwatch’s only downside was its price, but it’s now reduced on the Black Friday weekend. Hurry