What's the relationship of a resistors size to its electrical resistance? And how does resistance change when resistors are set in a series or in parallel? Watch the full lecture: http://www.rigb.org/christmas-lectures/watch/1968/gullivers-travels/lilliput-and-brobdingnag?utm_source=youtube&utm_medium=social&utm_term=description Philip Morrison gave the 1968 Christmas Lectures "Gulliver's Travels" which focused on the importance of scale in science. Taking inspiration from Dean Swift's Gulliver in the lands of Lilliput and Brobdingnag , we go on a journey from the fundamental building blocks of the universe to the stellar size of of our galaxy. In his fourth lecture, Philip Morrison imagines how our technology might operate differently if it was made by and for people significantly smaller or bigger than us. Watch the full series: http://www.rigb.org/christmas-lectures/watch/1968/gullivers-travels?utm_source=youtube&utm_medium=social&utm_term=description The Ri is on Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-policy Subscribe for the latest science videos: http://bit.ly/RiNewsletter