As 10 percent of the world’s wheat comes from Ukraine, Russia’s attack on the country could spark global food shortages. But the team discuss a simple solution to the problem that could have knock-on benefits for climate and biodiversity.In vampire news, the team explains how we may have found the secret ingredient in young blood that causes it to have rejuvenating powers. This comes off the back of a 2012 study which saw old mice rejuvenated fur after being transfused with the blood of the young.Cases of covid are on the rise globally, with China and Hong Kong hit particularly badly. Despite promising weekly declines since January, this new surge in cases is linked to various countries adopting ‘living with covid’ plans. As Iceland attempts ‘herd immunity’, the team examines the effectiveness of this strategy.A new candidate has emerged for ‘coldest place in the solar system’ - where do you think it is? The team explains why this information could be useful for the future of space exploration.Australia has been hit by massive floods, as the country faces yet another assault from climate change. This comes just 2 years after the Black Summer wildfires which caused unprecedented destruction, and even damaged the ozone layer - as the team discovers.And finally composer Hannah Peel, whose work is influenced by science and nature, helps us escape from the mayhem, sharing clips from her new album ‘The Unfolding’.On the pod are Rowan Hooper, Penny Sarchet, Alice Klein and Michael Le Page. To read about these stories and much more, subscribe at newscientist.com/podcasts.For a 20% discount subscription to New Scientist magazine, go to newscientist.com/pod20.For a 50% discount on New Scientist Academy courses, use the code POD50 at checkout at newscientist.com/courses. Offer ends on March 31st. Our GDPR privacy policy was updated on August 8, 2022. Visit acast.com/privacy for more information.