Catalyst: Series 18 • 2017 • 4 episodes • 5h:39m

Catalyst is Australia's premier science investigation series. Each week the team brings you stories from Australia and around the world, meeting scientists at the forefront of discovery.

Can Seaweed Save the World

Growing seaweed is now a ten billion dollar a year global industry. Tim travels to Korea to see some of the biggest seaweed farms in the world and meets the scientists who are hoping to create a seaweed revolution in Australia.

2/6 • 2017 • Economics

Can We Save the Reef?

Off Australia's northeast coast lies a wonder of the world, a living structure so big it can be seen from space, more intricate and complex than any city, and so diverse it hosts a third of all fish species in Australia. The Great Barrier Reef as we know it -- 8,000 years old and home to thousands of marine species -- is dying in our lifetime.

4/6 • 2017 • Environment

Secrets of the Dinosaur Crater

A group of world-renowned scientists are on a quest to uncover the secrets of the most significant day in our planet's history: the day that killed the dinosaurs. 66 million years ago an asteroid the size of London hit the planet in the modern-day Gulf of Mexico. Now, as co-leaders of an expedition to drill deep into the Chicxulub asteroid impact crater, Geologists Sean Gulick and Jo Morgan have set out to answer how this resulted in the extinction of dinosaurs.

5/6 • 2017 • Nature

Heartbeat the Miracle Inside You

Nikki Stamp takes us into the amazing world of our hearts -- revealing how they function, how we can look after them and shows us the latest science she uses to help fix them when they go wrong.

6/6 • 2017 • Health