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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

Can We Revive Extinct Species Like the Dodo?

Dodos are an icon of extinction, but could we bring them back?

• 32 mins

From Oldest to Strongest Living Thing

We revisit the oldest organism on Earth and meet the strongest

• 27 mins

What is dust?

Most people think it鈥檚 just dead skin. But what鈥檚 really hiding in your dust?

• 29 mins

Rudolph castrated: what you didn鈥檛 hear this year

Reindeer castration, plants get chatty and more quirky science revealed.

• 30 mins

Could our faces replace passports as ID?

Facial recognition could transform personal security but how easily can it be fooled?

• 30 mins

Why Does My Dog Love Me?

Dogs are our best friends. But why do they fit so seamlessly into human life?

• 29 mins

When Does Speech Become Music?

How do our brains tell the difference between music and speech?

• 26 mins

Are Crunchy Caterpillars the Food of the Future?

Meet the entrepreneurs turning bugs into food and get top tips on how to cook them

• 28 mins

How Far Can I See?

Is it possible to see 15 quintillion miles away?

• 26 mins

Must Life be Carbon-Based?

Must Carbon be the building block of life in the universe?

• 26 mins

Why Does Dark Matter, Matter?

Scientists have been hunting for it for decades, but will finding it change our lives?

• 31 mins

How does the Moon affect life on Earth?

We investigate the moon's effects on life on Earth from early births to interrupted sleep

• 33 mins

Do Animals Have Accents?

Can animals of the same species from different places communicate with each other?

• 26 mins

Could Bees Take Over From Sniffer Dogs?

How can we humans use other animals鈥� senses for our benefit?

• 28 mins

Is Nuclear Fusion Coming Anytime Soon?

After all the money spent, are we really anywhere close to limitless clean energy?

• 26 mins