Hidden clues and wombat poos: best of 2021

We're looking back on the year that's just been, and what a year 2021 was. Once again, Covid-19 dominated the headlines, alongside the climate crisis and extreme weather events. But fear not! Sally Le Page shares only the good news stories that we've covered here on the Naked Scientists, such as solving perennial train delays caused by leaves on the line, and even how we cracked the ultimate mystery: how wombats make their poos cube shaped... Like this podcast? Please help us by supporting the Naked Scientists