AP Blue Sky Science: How are waterfalls made? May 8, 2019 0 Facebook Twitter SMS Email Print Save It basically takes four things to make a waterfall: water, a land surface that’s made out of different rock types or sediment, a vertical drop, and gravity. Tags Wire Field59 Blue-sky-science Latest video 'Arrow' Season 8 Comic-Con Trailer Here's how to stay cool and safe during this weekend's extreme heat 'Celebrity Family Feud': Brooklyn Decker's Mother on the Spot Movies in a Minute: 'Lion King' & 'Once Upon a Time In Hollywood' 0:23 Circulation Support Staff - Pantagraph Media Fan uses tarp as slip 'n slide during last night's Phillies-Dodgers game More evidence links broken heart syndrome to cancer 0:14 Mental Health Providers at Central IL Psychiatric Facebook Twitter SMS Email Print Save Load comments × Post a comment as Emoticons [smile] [beam] [wink] [sad] [cool] [innocent] [rolleyes] [whistling] [lol] [huh] [tongue] [love] [sleeping] [yawn] [unsure] [angry] [blink] [crying] [ohmy] [scared] [sleep] [sneaky] [tongue_smile] [thumbdown] [thumbup] [censored] [happybirthday] [ban] [spam] [offtopic] [batman] [ninja] [pirate] [alien] Comment Text Cancel Post comment × Your comment has been submitted. × Report Cancel Report Abuse ×Reported ×There was a problem reporting this. × Watch this discussion. Stop watching this discussion. Watch this discussion Get an email notification whenever someone contributes to the discussion Notifications from this discussion will be disabled. Cancel Start watching Stop watching (0) comments Welcome to the discussion. Log In Keep it Clean. Please avoid obscene, vulgar, lewd, racist or sexually-oriented language. PLEASE TURN OFF YOUR CAPS LOCK. Don't Threaten. Threats of harming another person will not be tolerated. Be Truthful. Don't knowingly lie about anyone or anything. Be Nice. No racism, sexism or any sort of -ism that is degrading to another person. Be Proactive. Use the 'Report' link on each comment to let us know of abusive posts. Share with Us. We'd love to hear eyewitness accounts, the history behind an article. Post a comment Watch this discussion. Stop watching this discussion. Most Popular Dear Abby: Revelation at bachelor party throws wedding into question State Farm to demolish historic headquarters building Koos: Nord acted alone to 'poach' Bloomington business Normal police looking for man suspected of aggravated battery Crime Stoppers of McLean County 7/20/19 View All Promotions promotion Research decades of articles the easy way! promotion Enter the On The Road Again Summer Sweepstakes!