The teeth in these Australopithecus africanus skulls contain important evidence about the nutrition of these individuals as they grew up. Renaud Joannes-Boyau

Teeth ‘time capsule’ reveals that 2 million years ago, early humans breastfed for up to 6 years

A new study shows the enigmatic hominin species Australopithecus africanus may have breastfed young for around 5-6 years – a very costly practice for the mother.

Analysis and Comment

People do live outside Earth – on the International Space Station! But humans have had to find a way to make the conditions there more like what we’re used to at home. Flickr/NASA's Marshall Space Flight Center

Curious Kids: can people live in space?

The short answer is yes, but it’s really, really difficult.

‘This is going to affect how we determine time since death’: how studying body donors in the bush is changing forensic science

‘This is going to affect how we determine time since death’: how studying body donors in the bush is changing forensic science. The Conversation, CC BY77.2 MB (download)
On the outskirts of Sydney, in a secret bushland location, lies what's officially known as the Australian Facility for Taphonomic Experimental Research. In books or movies, it'd be called a body farm.

Curious Kids: how is the Sun burning?

It's true that here on Earth, if you want to burn something you need oxygen. But the Sun is different. It is not burning with the same kind of flame you would have on Earth if you burned a candle.

Curious Kids: why did the dinosaurs die?

Dinosaurs ruled the Earth for about 180 million years. But around 66 million years ago, a huge rock from outer space (called an asteroid) smashed into the Earth. Then things got worse for dinosaurs.

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Year of the elements

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Curious Kids

Curious Kids: what makes an echo?

When a sound is made, it spreads. And when it hits a hard surface that is far away, it bounces back and comes back to where the sound was made. That's what we call an echo.

Curious Kids: What is dew?

When water turns from a gas into a liquid, it forms droplets. Whether those droplets are dew or rain depends on where the droplet forms.

Curious Kids: why do we have a drought?

We can't make it rain. But you are already helping if you don't use more water than you need. And you can talk to your parents about the planet getting warmer, because the heat makes drought worse.

Curious Kids: why are burps so loud?

As gas from your stomach comes up your food pipe, it makes the surface of the upper part of your oesophagus rattle and vibrate. It is a bit like windows that rattle during a windy storm.

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50th anniversary of Moon landing

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