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Welcome to U3ACommunities

U3ACommunities is a free on-line platform for enquiring minds. It hosts a number of subject based groups who meet on-line monthly. It is independent of the Third Age Trust.

Whilst most of our members are beyond the age of retirement, we do allow anyone to join.

Use the GROUPS menu above to browse the groups and SUBSCRIBE to join one or more groups – you’ll then be emailed about new meetings and other posts. Both subscribing and attending meetings are free.

Individual groups may allow commenting on pages for any post-meeting follow-ups or discussions. The previously offered discussion forum has been disabled due to lack of use.

Why not join the fediverse u3a.social for discussions ?



Upcoming Online Meetings

The Ig Nobel Prizes: 2025 edition

For over a century, the ultimate recognition of ground-breaking scientific research has been the award of a Nobel Prize. But there’s another series of annual awards, less prestigious but no[...]

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10 December 2025 10:30 am - 12:00 pm

Mind-blowing Advances in Materials Science

Speaker: Professor Mark Miodownik University College London Mark Miodownik is a pioneering materials scientist fascinated by how the stuff of our world—metals, ceramics, polymers, biomaterials—shapes human experience. His work celebrates[...]

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26 January 2026 3:00 pm - 4:30 pm