91色情片

Regulars

Mathematics

How maths reveals the best time to add milk for hotter tea

If you want your cup of tea to stay as hot as possible, should you put milk in immediately, or wait until you are ready to drink it? Katie Steckles does the sums

Regulars
LIVERPOOL, ENGLAND - APRIL 09: win Randox Grand National Handicap Steeple Chase at Aintree Racecourse on April 09, 2022 in Liverpool, England. (Photo by Alan Crowhurst/Getty Images)

Are racehorses aware that they are expected to come first?

Regulars
Panoramic view of wind farm or wind park, with high wind turbines for generation electricity with copy space. Green energy concept.; Shutterstock ID 1933377149; purchase_order: -; job: -; client: -; other: -

Is there a tipping point when harvesting renewable energy is harmful?

Regulars
Farmer harvesting organic rhubarb from her kitchen garden. Rhubarb can be harvested many times through the year. Photographed at an ???off grid??? home on the island of Moen in Denmark. Colour, horizontal format with some copy space.

How was rhubarb found to be edible when it tastes bad raw? (Part 2)

Regulars
Galaxy - Elements of this Image Furnished by NASA; Shutterstock ID 1716207277; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

Regulars

Does “the earthquake chewed my data” trump “the dog ate my homework”?

Regulars

Tom Gauld on the outcome of an experiment

Regulars

Twisteddoodles: Researchers have made the world’s most powerful laser

Regulars
Hilma af Klint The Ten Largest, Group IV, No. 9, Old Age, 1907 Courtesy of The Hilma af Klint Foundation

91色情片

Famed abstract artists capture nature as you鈥檝e never seen it before

Regulars
2GYKRJN The waxing crescent Moon near the stars Castor and Pollux in Gemini, with Mars below, as the last of the winter stars set into the western twilight on

Space

How to spot Mars travelling through Gemini this week

No matter where you live, Mars is currently taking a little stroll through Gemini, so it is a great time to get to know this constellation with its twin stars, Castor and Pollux, and take a look at the Red Planet too, says Abby Beall

Regulars

If octopuses evolved to live on land, would they develop technology?

Regulars

If I go barefoot in snow my feet soon hurt, yet my dog seems OK. Why?

Regulars

What鈥檚 the most efficient way to load passengers into planes? (part 2)

Regulars

This week鈥檚 new questions

Regulars