Science correspondent Allan Blackman joins Kathryn to talk about what samples of the asteroid Bennu reveal about the building blocks of life on Earth. He'll also look at what's happening with the asteroid 2024 YR4, which is due to pass by Earth in 2032. And research from NZ's NIWA has revealed a significant trend in the atmosphere's self-cleansing ability.
Allan Blackman is a Professor of Chemistry, School of Science, Auckland University of Technology
