Interesting Engineering on MSN23m
20 million years to become a star: Cosmic clock unlocks mystery of sun’s birth time
The sun is believed to be 4.6 billion years old, but how long this glorious plasma ball exactly took to form is still unknown ...
Scientific American17m
The Arecibo Message, Earth’s First Interstellar Transmission, Turns 50
The Arecibo Message as it appears when its 1,679 bits are properly aligned on a grid (left), an annotated illustration ...