Are these dots blue or purple? Bizarre optical illusion will make

#xa; The optical illusion involves a series of 1,000 dots ranging from very blue to very purple

Bizarre glasses promise to prevent motion sickness - but they aren't

Bizarre glasses promise to prevent motion sickness - but they aren

That's roar-some! We can tell whether someone is bigger and

This is how much air pollution is going to cost the UK by 2035

Can YOU solve these optical illusions? Take the test to see if

Bizarre glasses promise to prevent motion sickness - but they aren

This is how much air pollution is going to cost the UK by 2035

Bizarre glasses promise to prevent motion sickness - but they aren't

Can YOU solve these optical illusions? Take the test to see if

Are these dots blue or purple? Bizarre optical illusion will make you