Technology: Most of Science & Technology

Most Disappointing Peek Through a Looking Glass If you get the wrong prescription at the local vision center, you can just go back and have it changed. Not so for NASA, whose incorrect prescription is spinning around the earth in the Hubble Space Telescope. Because a mirror was ground to the wrong shape, the space agency was saddled with a $1.5 billion instrument that performs far below expectations.

Bravest New Surgery Medical science, which can do remarkable things to repair the human body, took a giant step by daring to tinker with the original blueprint. In the first authorized use of...

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