Bob Alexander built a $20 spectrograph, and wrote in to share his results:
I went ahead and made one of these (actually two – after the first, I wanted a bigger one).
Excellent work, Bob!
I love Jon D’s suggestion for the Light switch time capsule:
I love this idea. I might try this out myself. You could essentially hide a small novel in the house. Just put at the bottom “Next, see bathroom switch. New? Check the light switch in the kitchen”.
cbrink has an important question about the Electronic sunglasses:
Are they peril sensitive?
noise_is_life approves of the rigorous testing performed by the makers of the beer-pouring robot:
I like all the bottles sitting around, QA is important.
Inspired by the speculative article about what would happen if all the elements were combined at once, Steve Hoefer put out this call for action:
Ah, the Internet has let me down. Virtually every search result for “flaming plutonium” leads to the PopSci article. And no related images at all! Come on, we’re innovative people around here, we can change this!
DustinTWeir explains how the sawdust + plastic bags materials hack works, and speculates how it might be recycled again:
You could just grind it up, add a bit more sawdust and a bit more plastic and do it again. You need both the sawdust to make the structure strong, but the plastic to bind everything together. Too much plastic and you’ve got a weak part, too much sawdust and you’ve still only got sawdust.
Over on twitter, Ahmad Jagot is ready for some DIY space action:
Just watched #Apollo13 on TV. Awesome, tried not to cry.. Now in the mood for @make DIY Space Issue – to infinity and beyond!
And on Facebook, Mike Lee is concerned for the safety of the Robot plant brains:
but, will robo vegan zombies come for the robo plant brains? :)
Like these comments? Be sure to sound off in the comments! You could be in next week’s column.