51动漫

2D4B1M5 Sporty young woman tying the shoelaces before run or jog.Concept of sport and healthy lifestyle.

What is the best way to tie shoelaces?

Our readers discuss whether reef knots, granny knots or other types of bows work best. And the difficulties of learning a new way to tie your laces

Does the expansion of the universe apply to atoms and objects like me?

The impossibly low rainbow: The mystery continues

We found this object a couple of weeks ago in the surf on Kilvickeon Beach on the south end of the Isle of Mull in Scotland. It was originally dark and got lighter as it dried out. It has a bit of an odd smell! Both sides which look very different. Taken a few days apart, tic-tac box for scale!

This week鈥檚 new questions

Does talking or singing to plants help them to grow better?

Could humans evolve into two different species in the future?

This week鈥檚 new questions

R5X7FW Cute small white dog rolling in mud and fall leaves

Why do dogs enjoy rolling in smelly fox or bird faeces?

2FWH4MD Caucasian man with blond long hair wearing casual denim jacket standing backwards looking away with arms on body

My hair has a kink. How do the hairs know exactly where to bend?

abstract numbers background; Shutterstock ID 97336559; purchase_order: PHOTO; job: Online LW; client: Helen; other:

What is the smallest number with no interesting properties? (cont’d)

As more readers ponder this question, It turns out that the numbers 51 and 247 aren鈥檛 so boring after all

This week鈥檚 new questions

Why are there seven colours in a rainbow?

Why do snails sometimes leave dotted trails?

This week鈥檚 new questions