Dear Science: Late scientists & controversial vaccination policies

AUT’s Allan Blackman joins us again live in the studio for Dear Science. He talks to Ximena about George Olah, a great chemist who passed away this week, and also about rocket scientist Bill Pickering, who died on this day 13 years ago. Allan also touches on a touchy subject, namely how it came out this week that Australia is considering banning unvaccinated children from childcare centres and preschools.