LONDON (AP) — Sam the Dog has gone where no stuffed animal has gone before — into the stratosphere and the English unknown.

Teachers and pupils at an elementary school in Morecambe in northwest England strapped the white fluffy school mascot to a high-altitude helium balloon and launched him from a hotel roof Tuesday. They recorded his rapid ascent some 15 miles into the atmosphere, much higher than planned, and captured the trip with an on-board video camera made by San Mateo-based company GoPro.

READ MORE: Family, Neighbors Stunned By San Francisco Teenage Girl's Murder; 'It Breaks My Heart'

After the balloon burst, Sam disappeared. The school hoped to retrieve him, but he was missing from the site where the balloon’s camera and GPS system landed some 30 miles to the east.

READ MORE: NHL Gambling Probe Of Troubled San Jose Star Evander Kane; Did He Intentionally Lose Sharks Games?

They have launched a social media-driven hunt for Sam in hopes that someone in northern England will find him. The school has set up a page on its website that is following the search for the stuffed animal.

MORE NEWS: 'Asians Are Strong' Leads SF Rally To Empower Community

TM and © Copyright 2016 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2015 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten. The Associated Press contributed to this report.