How things work

Why do small objects stick to our fingers when we push down on them?

World

What is the correct use of semicolon?

Living Creatures

Why do bees have stingers if using it will kill them?

Living Creatures

How do predators eat poisonous spiders and not die?

How things work

How does diet soda have 0 calories?

Human Biology

Why does a woman’s immune system attack and kill sperm cells?

World

Do governments have bank accounts? If not, where do our taxes go when paid?

Planet Earth

How do trees which don't produce fruit disperse their seeds?

Human Biology

What is the chemical that makes us feel good after doing something nice for someone?

Planet Earth

How can lightning strikes cut trees in half?

Science and Technology

How do emails detect and send spam to the junk folder but allow some emails come through to the inbox?

Outer Space

How do we know that fusion reaction takes place on the Sun?

Human Biology

What is nervous laughter and where does it come from?

Science and Technology

Why is HTML not considered programming?

Living Creatures

Why don't ​fireflies get hot when they glow? Why can't we make anything as efficient?