When did Catalyst Season 17 Episode 21 air?
Catalyst Season 17 Episode 21 aired on July 5, 2016.


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.

Do Australian ticks pose a greater health risk than we thought? For the first time, microbes inside native Aussie ticks are being probed, leading to new discoveries which may reveal the causes of unexplained illnesses.
Direct answers for episode-level questions and details.
Catalyst Season 17 Episode 21 aired on July 5, 2016.
This episode runs for approximately 29 minutes.
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