Myth busted: Americans spent millions to make a pen that would flow in space — the Russians used a pencil
It's a great story that reminds us complicated solutions can have very simple solutions. But the Russian pencil story is ...
Tag: pencil
How does an eraser work?
When you rub an eraser across a pencil mark, the abrasives in the eraser gently scratch the surface fibers of ...
Could you balance a pencil on a one-atom thick tip?
It's Saturday, so time for some fun physics. This non-trivial question is often asked in international physics contests and requires ...