This week, we're discussing ADHD: attention deficit hyperactivity disorder. It can lead to difficulty concentrating and focusing on tasks, and many adults don't actually realise they have it. So what is it, and what can we do to help people who have it? Plus, news of the Indian variant of Covid-19, new discoveries from the 40 year old Voyager 1 probe, and bats made from bamboo - but is that cricket? Like this podcast? Please help us by supporting the Naked Scientists