A mother of two in this suburb of Chicago doesn't have to turn on the news for an update on NASA's space mission. She just flips on her baby monitor. Since Sunday, Natalie Meilinger's baby monitor has been picking up black-and-white video from inside the space shuttle Atlantis.

"Whoever has a baby monitor knows what you'll usually see," said the elementary school science teacher. "No one would ever expect this."

Live video of the mission is available on NASA's Web site, so it's possible the monitor is picking up a signal from somewhere.

"It's not coming straight from the shuttle," NASA spokeswoman Brandi Dean said. "People here think this is very interesting and you don't hear of it often — if at all."

Meilinger silenced disbelieving co-workers by bringing in a video of the monitor to show her class on Tuesday, her students' last day of school. At home, 3-month-old Jack and 2-year-old Rachel don't quite understand what their parents are watching.

"I've been addicted to it and keep waiting to see what's next," Meilinger said.