This week: aircraft behind-the-scenes, a great camera, and a clever clock.

• Tomáš Zeman ("Zeto") is an aircraft maintenance engineer at Austrian Airlines, and surprisingly, his employer lets him run a whole behind-the-scenes YouTube channel! Most recently: how to fly when you can't sit, which covers something I've never heard of, installing a stretcher on an aircraft for a medical evacuation. And on a more technical note, how to wash an aircraft engine, which has a lot of jargon but also some great shots of cleaning out an aircraft engine with foam and water. (Thanks to Jon for sending this over!)
   
• Rock concert movement #63: bringing out Venus Hum. Before this video, I knew the Blue Man Group were a thing. I just didn't really understand what they do. I thought it was some kind of performance-art prop-comedy music thing. And now, thanks to this entirely bootlegged clip from their 2004 Complex Rock Tour DVD: I would like to see them.
   
• Normally, Eric from Hand Tool Rescue rescues hand tools. It's in the name. But he casually mentions his PhD in plant science in the first minute of this video, because he's trying to grow 100-year-old tomato seeds. It's in his typical style, just a different subject.
   

• "I use my line scan camera to take cool pictures of trains and other stuff," says Daniel Lawrence Lu, who has the best personal domain name I've ever seen, "but there’s a lot that goes into properly processing the images." A line scan camera is a camera where one dimension is height, but the other one is time, and the results are fascinating.
   
• The day "Return" became "Enter". An exhaustive (perhaps slightly too-exhaustive) history of how we went from typewriters to the modern Enter key.
   
• This Pong Clock is really clever: the two computer-controlled players co-ordinate to match up the score to the actual time.

And finally: a very pleasing cross-section visualiser. (It's worth clicking through to see more.)

All the best,

— Tom