Almost every schoolchild learns that Thomas Edison invented the light bulb. But did he? And if he hadn’t invented it, would we be still living in the dark? Ac

Did you know that changing just one high energy lightbulb to a low energy one saves 75kg of carbon dioxide a year? This book provides hundreds of practical idea

This side-splitting collection of 101 of the best lightbulb jokes you have ever heard is dangerously funny! Jack Goldstein aims his humour cannon at older child

Can you ever be in the wrong place at the right time? If 299,792,458 m/s is the speed of light, what is the speed of dark? Do you get lost in thought because it

Do you want to finally, conclusively, and at (very) long last, learn the Secret? Are you REALLY sure? Because now's your chance to escape... No? You're staying