Identical twins Helen Besgrove, a marketing executive, and Kirsty Neal, a GP, share their different experiences perceiving the world ...

Judy Stokes, a retired GP, shares her experience of spatial-sequence synaesthesia ...

Your brain is a fascinating piece of machinery. It has remarkable capacity for development. Very subtle changes in how the brain develops, or in how it responds, can lead to us experiencing the world ...

Autistic patients are more likely to also have synaesthesia, suggests new research in the journal Molecular Autism. Synaesthesia involves people experiencing a 'mixing of the senses', for example, ...

Aimee and Rebecca might not look at all alike, but their names are both red, so forgive me if I confuse them occasionally. At least I can make up for it by remembering their birthdays. Is Harriet’s ...

Dr John Harrison, former senior neuropsychologist and research fellow at Cambridge University, has written a book, Synaesthesia: The Strangest Thing, detailing his 12 years of research into the ...

Synaesthesia is a neurological condition found to enhance memory and learning. Now, scientists say seeing in colour could help when it comes to learning a second language. My mother's name is the ...

Number colours People with the ability to see colours for letters or numbers show heightened activity in the area of the brain associated with vision, UK researchers have found. The study, published ...

Julia Simner receives funding from the European Research Council, the Misophonia Research Fund, and the Kavli Foundation. Look around you – what does the world feel like? Some of it – like the colours ...

Many people see words as colours, smells or sounds, and they swear it boosts their creativity. So could we all tweak our senses to see the world in this way? Olympia Colizoli doesn’t see the world ...

If romantic films are to be believed, kissing someone special can leave you seeing fireworks. For 38-year-old Sariah of California, it’s closer to seeing the Northern Lights. What she experiences ...

Sorry, transcripts of this BBC Radio 4 series cannot be made available for copyright reasons. See the links below for more information We all wonder at some point ...