This is not a colourful bird’s nest: it is the collection of muscle fibres that work together to make a mouse heart beat. Laurence Jackson from University College London captured the vivid ...

And remember, your heart beats 60 times per minute, 60 minutes an hour, 24 hours a day and 365 days per year. That’s 31,536,000 beats every year – if all we did was just sit still!