[bitluni] took matters into his own hands and built this nifty DIY hole punch for light-gauge sheet metal. A little backstory will probably help understand why [bitluni] needs so many holes.

In this activity, students will use a piece of black ... Make them a variety of sizes by using the single-hole punch, the pen or pencil, and the pin. Tack the black sheet to the front of the ...

The clouds looked like someone had taken a hole punch to the sky ... data collected from the satellite to map the impact of human activity and natural disasters. Read next ...