Oops! The episode is no longer available but you can find other episodes below.Back to Everyday KnowledgeWatch Everyday Knowledge Episodes Onlineplay_circle_filledThe Closest Black Hole Isn't as Far as You'd Likeplay_circle_filledWhy Beaches Need More Sandplay_circle_filledWhat the oil industry doesn’t want you to know - Stephanie Honchell SmithmoreWATCH IN APPplay_circle_filledchevron_leftchevron_rightComments