The Hubble Space Telescope is nearing its 35th anniversary and skywatchers can celebrate the mighty telescope with a year-long observation challenge. Hubble launched to space on April 24, 1990, aboard ...

Spot the Difference puzzles are among the most popular puzzle games on the web because they test your observation skills, visual memory, and concentration. These puzzles are relaxing in nature, and ...

All the Latest Game Footage and Images from Train Your Focus and Observation Skills: The Spot-the-Difference Challenge Sharpen Your Mind as You Play! A Slightly Challenging Spot-the-Difference Games ...

Get ready to celebrate the Hubble Space Telescope's 35th anniversary with a year full of observations. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...