91色情片

T4AEYJ Stellar explosion shining in deep space, cosmic star blast in Universe. High resolution galaxy background.

In which direction in the sky did the big bang take place? (part 2)

Our readers imagine that they are inside the soup of particles that originated in the big bang to attempt to get their heads round this question

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

This week鈥檚 new questions

Scones

How does a scone develop a 鈥渨aist鈥� as it rises in the oven?

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

Why do loose screws only get looser, not the other way round? (part 2)

MXMH8X colorful water drop splash

This week鈥檚 new questions

Sore Tooth Decay. Dental Care And Pain; Shutterstock ID 1895847487; purchase_order: -; job: -; client: -; other: -

What is the point in having nerve endings in our teeth?

2CTJXXG Male fitness instructor with women lifting weights while standing in yard

Doing strenuous exercise, it helps to shout the number of reps. Why?

Would a tug of war be possible over 42 km between France and England?

CX3N1D three 3 old men friends talking arguing discuss

How much of my body from 40 years ago is part of me today? (part 2)

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.

This week鈥檚 new questions

How was rhubarb discovered to be edible when it isn鈥檛 palatable raw? Why do flames go out when blown?

What is the most efficient way to load passengers into an aircraft?

Why are birds mostly monogamous, but not mammals?

This week鈥檚 new questions

Is sweat from exercise different from that due to anxiety or illness?