Articles on Curious Kids

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Knismesis occurs from a light touch, like a feather touching you and can happen on the skin anywhere on the body. www.shutterstock.com

Curious Kids: Why are we ticklish?

People have wondered for years and scientists still don't know for sure.
Some people thought Charles Darwin was suggesting that, over a very long period of time, apes turned into people. He was not. Flickr/Ronald Woan

Curious Kids: Can chimpanzees turn into people?

The short answer is no. An individual of one species cannot, during its lifetime, turn into another species. But your question helps us think about life, evolution and what it means to be human.
When we get hot, sensors in the body tell the brain. The brain then tells the sweat glands to work, and we sweat. Marcella Cheng/NY-CC-BD

Curious Kids: What happens in the body when we sweat?

Sweat comes from special parts in our skin called glands. You might be able to see them if you have a very strong magnifying glass.
The air doesn’t like to be under pressure just like us. The wind is the result of the air trying to escape from high pressure. Mami Kempe / The Conversation

Curious Kids: What causes windy weather?

Wind is just air moving from one place where there is high pressure to another place where there is low pressure.
Flies will often sleep on the underside of leaves, to escape from heat and predators. Mai Lam/The Conversation NY-BD-CC

Curious Kids: Where do flies sleep?

Flies need good grip because they often sleep upside down.
Hiccups might be a way to train breathing muscles and our hiccup reflex might actually come from our amphibian ancestors. Mami Kempe / The Conversation

Curious Kids: Why do people get the hiccups and how do you get rid of them?

Hiccups serve no clear purpose. Tadpoles have a hiccup reflex which helps keep their lungs safe while they transition. So our hiccup reflex might be from our amphibian ancestors.
X-ray vision is not only possible, it already exists – but using computers, not eyes. Marcella Cheng/The Conversation

Curious Kids: Is x-ray vision possible?

Human eyes don't have x-ray vision. But we can use radiography machines to allow our eyes to see inside things the human eye cannot.
Generally once a fortnight, someone at home will place the recycling bin out for a truck to drive past and empty your bin. Marcella Cheng/The Conversation

Curious Kids: Where do my recycled items go?

Magnets, air blowers, centrifuges, crushers: your recyclables go through a lot before they get turned into something else.
When a pain signal gets to the brain, it lets your brain know there’s a big problem so we can respond. AAP Image/DAN PELED

Curious Kids: How does pain medicine work in the body?

In short, pain medicine is able to block the processes that cause the feeling of pain. To understand why, you need to know a bit about how pain works.
Only clouds that are tall with big water drops can make rain, but they also stop most of the light, which makes them look grey. Marcella Cheng/The Conversation

Curious Kids: why does rain only come from grey clouds?

To answer this question from Fiona, age 6, we need to know some things about clouds and light.
We know that lots of animals, maybe all animals, sleep. Cats, dogs, even worms and jellyfish sleep. But we still don’t know exactly why they started sleeping. Marcella Cheng/The Conversation

Curious Kids: Do animals sleep like people? Do snails sleep in their shells?

Pond snails use things like rocks or the side of their aquarium as their bed, attaching themselves while they sleep. This might not seem very relaxing but their shells do hang away from their body.
Our bones grow and change over our whole life. Marcella Cheng/The Conversation

Curious Kids: Why do we have bones?

Bones protect our insides, help us to move and even help make our blood.
It turns out that the world is about 4,600,000,000 years old. That’s 4.6 billion years. That’s pretty old! Marcella Cheng/The Conversation

Curious Kids: How do scientists work out how old the Earth is?

The world is made of tiny building blocks called 'elements'. Scientists have worked out how fast some elements change into other elements. That gives us a very big clue about how old the Earth is.
Glasses help people to see by focusing light onto the retina. Marcella Cheng/The Conversation

Curious Kids: How do glasses help you see?

Many people, from children to the elderly, wear glasses. Andy, age 5, wants to know how they work.

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