91色情片

Last Word

Why does the return journey seem much shorter than the outward leg?

Our readers really get to grips with this one, putting it down both to our appreciation of the passing of time and to our knowledge of a route. But they also suggest testing their hypotheses

Regulars
A8R854 House Mouse Mus musculus scurrying across garden lawn Kent UK

Can a trapped mouse really find its way back from a mile away?

Regulars
2HCTCGW grumpy cat sits on a newspaper stack

This week鈥檚 new questions

Regulars
ROTHBURY, NEWCASTLE UPON TYNE, ENGLAND, UK - JULY 06, 2019: Two cyclists peddling hard up a steep hill at the cyclone race event from Newcastle to Northumberland.; Shutterstock ID 1539510248; purchase_order: -; job: -; client: -; other: -

What is the best option to save energy when cycling on hilly roads?

Regulars
2F959A7 Cabazon, CA, USA: June 18th, 2010: A 65-foot-tall Tyrannosaurus rex known as Mr. Rex is part of a roadside attraction that stands near the freeway in

Where is 180 million years鈥� worth of dinosaur poo?

Regulars
AY65GM 10 97 Australia Queensland Beauty Spot sign Photo c Simon Grosset

This week鈥檚 new questions

Regulars
2CG262A Old fashioned street clock with Roman numerals without arrows on blue slightly cloudy sky background. Real view of street clock in city. Stopped time

What would happen if time stopped?

Regulars
J773YF Kitchenware on shelves with stainless steel sink in 17th century Kintyre stone cottage

What happens to the stains in my sink when I clean it with bleach?

Regulars
2H6020J Few pedestrians on the rather busy street in metaverse conceptual reality

This week鈥檚 new questions

Regulars
2RXK2EN Catford Local Area Photography

What is the largest size an animal can be?

Our readers explain the maximum size of a quadrupedal animal and consider the sizes of dinosaurs, blue whales and colonial organisms

Regulars

Is there the same number of electrons as protons in the universe?

Regulars

Will we ever be able to tell if an AI gains consciousness? Part 2

Regulars

This week鈥檚 new questions

Regulars

How do I know if what I see is actually there?

Regulars