When NASA began the launch of astronauts into space, they found out that the pens would not work at zero gravity (ink will not flow down to the writing surface).
Solution # 1 : To solve this problem, it took them one decade and $12 million. They developed a pen that worked at zero gravity, upside down, underwater, in practically any surface including crystal and in a
temperature range from below freezing to over 300 degrees C.
Solution # 2 : And what did the Russians do...?? They used a pencil
