30-Second Great Inventions 30-Second Great Inventions 50 Light-bulb Moments that Changed the World, from the Compass to the Smartphone, Each Explained in Half a Minute Ed. David Boyle Ivy2018Hardback160pp Illustrated227x180mm 9781782405122 Product Code: 511498 publ £14.99now £5.99 Qty Qty123 Add to Basket CategoriesEducationMathematicsScienceTagsInventions & inventors