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COVID19 is a chilling reminder of how pathogens from animals can jump into humans. But it鈥檚 not the first time. SARS, Ebola, West Nile virus and bubonic plague are all serious infectious diseases that sat in a host species before crossing to us. But what causes this to happen? Individual case studies suggest that we are partly to blame in the way we use the land, either through urbanisation or agriculture. But how widespread is this, and do our global patterns of land use systematically put us at risk? Adam talks to environmental biologist David Redding from the Zoological Society of London, and his team, whose new study suggests they do.

Jessica Bradford, the Keeper of Collection Engagement at the Science Museum, asks for your help with another mystery object that they鈥檝e uncovered during their recent collection move.

Roland Pease reports on the chain of interconnected faults which has stimulated Los Angeles' preparation for 鈥渢he big one鈥�, after southern California was hit by one of the biggest earthquakes in the area for decades.

Adam also asks Neil Gemmell from the University of Otago in New Zealand about the weird and wonderful Tuatara, whose colossal genome he鈥檚 just sequenced.

Presenter: Adam Rutherford
Producer: Beth Eastwood