Nina and the Neurons: In the Lab

Nina investigates why we get sleepy dust in our eyes. Experimenters Daniel and Luke visit Nina in her lab and work out that sleepy dust feels gritty and hard. Nina does an experiment to show us that our tears aren't just plain water - they have special cleaning salts in them. They find out that our eyelids are a bit like windscreen wipers.

Category

Children / Science

Original air date

28/09/2010