91色情片

mist, rain

How fast would you have to travel to be able to run on water?

There is no way we could run fast enough to run on water, say our readers, but there are many other ways to achieve this feat

CX3N1D three 3 old men friends talking arguing discuss

This week鈥檚 new questions

Large group of people on the move, some shopping, some holding hands, others just walking along.

What is the age/location/appearance of the world鈥檚 average person?

illustrating the accelerating expansion of the universe

How can stars be 30 billion light years away?

Milk coffee is a combination of equal parts espresso, steamed milk and milk froth.

This week鈥檚 new questions

P4ECNR Colorful soda drinks macro shot

Do drinks really taste different from cans or plastic/glass bottles?

CEKXK0 A selection of QR (Quick Response) smartphone codes taken from British newspapers and magazines in late 2011, early 2012.

Are there limitless permutations of QR codes, or are they recycled?

Sports injury concept. Cropped portrait of black male runner wearing black training outfit touching his leg in pain with clasped hands, having sprain or twitch in his knee after running exercises; Shutterstock ID 478297546; purchase_order: -; job: -; client: -; other: -

Why is pain so painful? (continued)

Loosen bolt in daylight close up.; Shutterstock ID 1195047430; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions: Loose screws and brain overload

Part of the Guadiana river has dried up and gives way to dry land under the Puente de la Mesta medieval bridge in Villarta de los Montes, in the central-western Spanish region of Extremadura, on August 16, 2022. - Temperatures in Spain have been very high this summer with several unusual heat waves. Scientists say human-induced climate change is making extreme weather events including heatwaves and droughts more frequent and more intense. (Photo by THOMAS COEX / AFP) (Photo by THOMAS COEX/AFP via Getty Images)

Where is the water that Europe and China are missing this year?

Certain parts of the world have experienced severe drought this year, and our readers pinpoint where this 鈥渕issing water鈥� has gone

What happens to a photon after it hits the retina of my eye?

Why do humans have pubic hair? (Part 2)

This week鈥檚 new questions

What happens if I shine a torch when moving at the speed of light?