Build a simple roller coaster, and out of basic materials - paper, sellotape, blu tak. All you need to do is drop a marble down the start of the rollercoaster when the timer reaches 0s and make ...

2015 issue of Science, published by AAAS. The paper, Charles M. Bishop at the University of Bangor in Bangor, UK , and colleagues was titled, 'The roller coaster flight strategy of bar-headed ...