Contains the apps for the Columbus Eye work sheets "Aralkum - A Lake Disappears", "The Eye of the Cyclone", "From the Earth to the Moon and Back - Gravitation in the Earth Moon System", and "Earth by Night - Light Pollution".
Known problems (we're working on it): - Videos aren't always loaded properly. Quitting (button at the end of the main menu) and restarting the app usually does the trick. - Some phones can't download the additional material. We presume it's either HTC or Android 9 and are thankful for any hints. - The Moon is reluctant to stick to the laws of nature and twists and turns in whichever direction it likes.