While many were hoping the COVID-19 pandemic was over, scientists were more surprised the Delta variant hadn't been overtaken by another variant. 

Unfortunately that has now happened and Emma Keeling speaks to virologist Jeremy Rossman about how worried we should be about the Omicron variant and also takes a look at Japan, where cases have dropped dramatically from their peak after the Tokyo Summer Olympics. 

Could a Japanese scientist's theory be right that the virus has mutated so much it's driven a strain to extinction?

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Age-related macular degeneration, or AMD, is an eye condition that affects millions of people around the world. 

In the UK, it is the biggest cause of sight loss. At King's College London and Moorfields Eye Hospital, scientists are developing a new treatment that could help people to see again by implanting stem cell patches into their retinas. 

A trial has already been successfully tested on two patients, both of whom went from not being able to read at all even with glasses, to reading 60 to 80 words per minute with normal reading glasses.