The BBC brings you all the week's science news.
All available episodes
Upcoming episodes (6 new and 18 repeats)
The race for a vaccine, the spread of Covid-19, future pandemics and virus mutations
See stories about the future of space on the World Service English YouTube channel
Does the Brazilian coronavirus variant spread more easily?
The spray is designed to block coronavirus as it tries to enter cells in the nose
New technology aboard Nasa's Perseverance rover will help it avoid hazards, such as cliffs
What could Jezero Crater reveal about the history of life on the Red Planet?