Optical Illusion: Only a sharp-eyed person can spot the red ruby among roses
Optical illusions and brainteasers provide mental benefits and enjoyment. The challenge involves finding a hidden ruby among ...
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'Bull's-eye!' Hubble telescope spots record-shattering 9-ring galaxy — and the cosmic 'dart' that smashed through its center
Scientists using the Hubble Space Telescope have spotted a record-smashing galaxy wrapped in 9 rings of stars — along with ...