Back home in the office/studio working on slides for the TEDYouth talk. Spent altogether too much time on telescopes today. Way too much. I estimate that this finished drawing of telescopes will last on screen about 45 seconds… if I’m lucky. On the other hand, that 45 seconds will in principle be multiplied by many thousands since they’ll be putting the TEDYouth talks online for you to see… so worth getting the colour harmony right perhaps?