Summary: Every year, an estimated 1,000 polar bears linger outside the small Canadian town of Churchill, Manitoba waiting for the Hudson Bay to freeze over. For a second year, explore.org will provide a front row view of the annual migration, streamed live online at explore.org/polarbears. explore.org hopes to turn non-stop live coverage of the migration season into a global event people use to measure the health of the planet and mark the true coming of winter in one of earth?s most precious bellwether ecosystems.
