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Why Do We Have Males and Females?

We plunge into the weird world of sex determination.

• 26 mins

Where鈥檚 my Ejector Seat?

Why can鈥檛 commercial planes have ejector seats, like fighter jets do?

• 27 mins

Why is Childbirth Painful?

Why is it more painful for some women than others?

• 26 mins

Why do Human Faces Look so Different?

Unlike most animals, human facial features evolved to have more variety. But why?

• 30 mins

What鈥檚 the Oldest Living Thing?

What is the oldest tree or other living organism on Earth?

• 27 mins

Why Does It Always Rain on Me?

How do microclimates affect our weather and our lives?

• 27 mins

Can Your Lifestyle Be Passed on to Future Generations?

Can your lifestyle be passed on to future generations?

• 29 mins

Can Plants Talk?

This week we hack the secret plant communication network 鈥淭he Wood Wide Web鈥�.

• 28 mins

Do We Think in Words?

Do we think in words, images, or abstract concepts?

• 28 mins

Does Time really Exist?

Does Time really exist or is it all in our heads?

• 30 mins

Why is it so Hard to Quit Smoking?

We look at how nicotine tricks the brain into thinking tobacco鈥檚 good for us.

• 28 mins

Could a Computer Judge My Crime?

How much of the justice system could be replaced by technology?

• 27 mins

What Do Our Accents Say About Us?

Why do we sound so different from each other 鈥� even when we speak the same language?

• 26 mins

Can Animals Commit Murder?

Are humans the only species that murder each other? We head to the rainforest to find out

• 28 mins

Lightning Strikes Again

Can we collect electricity from lightning?

• 35 mins

Sydney Science Festival, Australia

Your questions about life, Earth & the universe tackled by a panel of experts.

• 26 mins

Trees v Air Pollution - the Rematch

Could trees be even better at tackling air pollution than previously thought?

• 27 mins

Spider Silk and Super Fly Senses

Your questions about the super abilities of insects

• 27 mins

How Could Humanity Become Extinct?

Nuclear weapons and mega asteroids: what would the aftermath look like?

• 29 mins

Could All Cars Be Electric?

Just one per cent of vehicles are powered by electricity

• 29 mins

Should We Kill One Species to Save Another?

Is it fair to kill invasive species which humans have introduced?

• 31 mins

Can We Make Artificial Organs?

Human organs are in short supply. But what if you could grow news ones in the lab?

• 26 mins

Is Carbon Dioxide Higher Than Ever?

Where did our climate last have this much carbon dioxide?

• 26 mins

Can We Worm Our Way Into Better Health?

Could parasites help give our immune systems a boost and help us fight disease?

• 27 mins

Is There Proof of Life After Death?

Many people believe in an afterlife. Does science have any proof it exists?

• 26 mins

How Can We Fight Unwanted Noise?

Can science and engineering tackle annoying, ear-damaging sounds?

• 37 mins

How Did Life Get onto Land?

It was one of the most unlikely events in history. But how did fish become land animals?

• 29 mins

How Can I Remember More?

Does your memory sometimes fail you?

• 33 mins

Why are There Morning People and Night People?

What makes some of us early birds and others night owls?

• 27 mins

Does Technology Change How we Fall in Love?

Are computer algorithms the best way to help people make permanent romantic connections?

• 26 mins