Health & Medicine



Confused person seeing stars

What Causes Déjà Vu?

Source: Scientific American

It’s an eerie feeling: You walk into a place you know you’ve never been before but are overwhelmed by a sense of familiarity—a memory you can’t quite reach. Has this all happened before?
The sensation is known as déjà vu, and though it is hard to study, scientists are slowly figuring out why it happens.



Colorful rainbow smoke on black background

This Impossible New Color Is So Rare That Only Five People Have Seen It

Source: Scientific American (YouTube)

Have you ever seen the color “olo?” Unless you are one of only five people on the planet who have, the answer is ‘no.’
Recently, researchers achieved the unusual feat of stimulating the eye in such a way as to allow it to see a color outside the range of normal human vision. This work is brand new, but scientists hope that it will lead to new vision treatments and help us to better understand how animals see the world.