As a deadly new virus starts spreading in Wuhan, China, so do rumours about a lab there. What does the lab do? And what does it all have to do with bat droppings? Show more
A team of top scientists ask where Covid came from. But can they trust data from China? Claims of cover-ups and conspiracy theories complicate the search for an answer. Show more
US President Donald Trump says he’s confident Covid leaked from a Wuhan lab. But scientists seem certain it didn’t. What does the evidence show? Show more
A World Health Organization team heads to Wuhan to search for the origin of Covid. But with the Chinese government closely involved, how free will they be to find the truth? Show more
A new US president helps bring the lab leak theory into the mainstream. How safe are top-security laboratories? And do the benefits of their work outweigh the risks? Show more
Mysterious deaths in Soviet Russia and what they might tell us about the origin of Covid. Should we treat information from inside authoritarian states with trust - or suspicion? Show more
Speculation online suggests that newly declassified US intelligence will contain smoking-gun evidence. Does it? And what conclusions can we reach? Show more
Politicised, polarised, and caught up in a chaos of cover-ups, coincidences, and conspiracy theories, it’s one of the biggest questions of our time: where did Covid come from? Show more