It looks like the Perseverance rover has an unwanted passenger, a rock stuck inside one of its wheels. The image of the stone was selected by public input as the "Image of the Week" for Week 54 (Feb.… [+3380 chars]
Having never evolved wings, many species of spider instead evolved an uncanny ability to take to the skies using nothing more than a few short threads of gossamer dangling from their dainty butts. J… [+3535 chars]
