• Premiered: Feb 2009
  • Episodes: 295
  • Followers: 1
  • Running
  • ABC (AU)
  • Tuesday
  • Documentary

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Season 21
21x1
How Food Works (Part 1)
Episode overview
Air date
Apr 14, 2020
In a two part special, chef Paul West, dietician Professor Clare Collins and chemist Dr Noby Leong reveal the delicious chemistry, biology and physics hidden inside the foods we love, so we can cook better and eat healthier.
21x2
How Food Works (Part 2)
Episode overview
Air date
Apr 21, 2020
Paul explores the science behind cryogenic freezing and how it's being used to ensure frozen fish tastes almost as good as fresh. In a gelato factory, Clare gets the scoop on why humans are hard-wired to desire junk food.
21x3
Teeth Clinic
Episode overview
Air date
Apr 28, 2020
Catalyst sets up a pop-up dental clinic in Western Sydney to investigate Australia's most common dental complaints, uncovering the tips to keep your mouth healthy and revealing surprising secrets behind a beautiful smile.
21x4
Asteroid Hunters
Episode overview
Air date
May 05, 2020
Asteroids are an ever-present threat to our survival, but as Astrophysicist Professor Tamara Davies discovers - they may also be responsible for kickstarting life on Earth.
21x5 Season finale
Building Greener Cities
Episode overview
Air date
May 12, 2020
As our populations grow, cities are under increasing pressure. Physicist Dr Niraj Lal explores engineering solutions designed to make our cities cleaner, greener and more efficient places to live.

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