Blocking the dividing line with a pencil or your finger will help.
Which rectangle is darker?
Phew! Creepy alien on a recent flight turns out to be an optical illusion
A passenger was minding their own business on a recent flight when they came face-to-face with what looked like ET's homelier cousin. "I ALMOST LANDED THIS PLANE MYSELF" they Xitted,… READ THE REST
This Victorian ghost book exposed spiritualist frauds with cool optical illusions
In 1864, a peculiar book called "Spectropia" offered Victorian readers a scientific way to summon ghosts. As the Smithsonian reports, author J.H. Brown created this "toy book" to combat what… READ THE REST
Brain-bending experiment reveals why kids struggle with writing
Here's a fun puzzle from Martin Gardner's book, Amusing Experiments. IT IS VERY DIFFICULT TO LEARN TO WRITE Now, when you have learned to write and draw pictures, you may… READ THE REST
Ultimate gamer gift: Minecraft Java and Bedrock editions for just $17.97
TL;DR: Save 40% on this Minecraft duo—get Java and Bedrock Editions for just $17.97 (reg. $29) through December 8. Calling all gamers (and gift-givers)! The ultimate sandbox adventure, Minecraft Java & Bedrock Edition,… READ THE REST
Premium smartphone camera telescope now $23 — save over 50% today
TL;DR: Save 45% on this HD monocular telescope, now available at the Cyber Week price of $22.97 (reg. $54) for only two more days. Are you stumped on what to get… READ THE REST
Lifetime access to 1,500+ book summaries just dropped to $60
TL;DR: Boost your knowledge and become a conversation starter with lifetime access to Headway — skip ahead to checkout and get it for $59.99. Ever wished you could contribute more engagingly to… READ THE REST
