In particular, it explains that humans have one fewer chromosome pair in their cells than apes, due to a mutation found in chromosome number 2 that caused two chromosomes to fuse into one.

No.2 pencils are widely used, but you may not know what the number actually refers to. This video explains how pencils developed into their modern form and the significance of the labeled numbers.

For design inspiration, we put together 60 free, printable pumpkin carving stencils. With so many to choose from, there’s a stencil to fit every carver’s vision. From scary to friendly jack-o ...

Yes, most printable stencils can be resized before printing. Use your printer settings to adjust the size to match your ...

Hey, these are dancing shoes! Both: One, two, one, two, one, two, one, two. One, two, one, two, one, two, one, two. Two: Everything is better with two. The two of us ...

Double-sided circuit boards might be able to pass through the process using a single stencil. This is known as an A/B flip ...

For more pumpkin decorating ideas, make sure to check out our list of painted pumpkin ideas, simple Halloween crafts, and free printable pumpkin stencils next. You can't go wrong with an oh-so ...

Brandon Litman creates art stencils of Kamala Harris to engage voters and build community. Political art stencils have been ...

and he wasn’t able to have it create holes for 0.2 mm x 0.5 mm pads without first modifying his printer for better X/Y accuracy. In the end, he admits that while a functional DIY solder stencil ...

PCB stencils make application of solder paste a snap, but there’s a long, fussy way to go before the paste goes on. You’ve got to come up with some way to accurately align the stencil over the ...