Shared on Facebook by the account Minion Quotes, this particular brain teaser is a visual treat — and a bit of a headache. The image features dozens of cartoon owls, all drawn with similar wide eyes, ...

And then, there are optical illusions – the internet’s favourite form of mind trickery. These visual puzzles not only boggle ...

Can you spot the hidden needle in 5 seconds? Sharpen your focus, test your visual IQ, and challenge your brain today!

According to current theories of expertise, this shouldn’t happen. Becoming an expert in chess, for example, makes you better ...

Radiologists are particularly adept at spotting optical illusions, according to a new study that sheds light on how one could ...

Optical illusions are great fun ... We studied 44 radiologists, compared to over 100 psychology and medical students. Below is one of our images. The orange circle on the left is 6% smaller ...

Optical illusion personality tests, as the name reveals, are weird-looking pictures that trick the eyes and act as illusions ... they are not always 100 percent true. Why? Because these tests ...

We are Edinburgh's oldest attraction and have been amazing visitors with a combination of over 100 optical illusions and breath-taking rooftop views for 175 years! Britain's most fun attraction ...

We are Edinburgh's oldest attraction and have been amazing visitors with a combination of over 100 optical illusions and breath-taking rooftop views for 175 years! Britain's most fun attraction ...