91色情片

MXMH8X colorful water drop splash

I fill a tub with water by gravity, but what happens to the gravity?

It is tempting to think that gravity somehow gets used up, but our readers reveal what really happens due to the pull of gravity

People say 鈥榣aughter is the best medicine鈥�, but does it actually help?

Aerial view of car driving on beautiful steep curved road (look like number 3) on the high mountain in Nan province, Thailand.; Shutterstock ID 1815816242; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

Helluva twist: Did Dickens create the first android in literature?

Tom Gauld: A scientist grows up

Twisteddoodles on a strangely sticky asteroid

Andrew McCarthy and Jason Guenzel 140 megapixel image of the sun

91色情片

Dazzlingly detailed photo of a record solar tornado ’14 Earths tall’

TTA1TP Farmer planting asparagus into black soil in garden

Life

How to grow asparagus – and why it takes so long

The hunt for the missing heart of Holy Roman Emperor Otto the Great

A low angle action shot of a road cyclist approaching a smooth tarmac hill on a group ride around Seva, Catalonia, Spain.

Why are the gears and chain always on the right鈥慼and side of bicycles?

Right-handedness, horse-riding habits and swords are all reasons why bike chains are found on the right side of bikes, say our readers

Do birds have faster reaction times than humans?

Would a tug of war be possible between France and England? (part 2)

This week鈥檚 new questions

Tom Gauld on a parallel universe where time flows backwards