How human babies are made [Gif]

Please click on image to expand. Now here comes a very educational Gif. A very informative visual on the whole process of how humans are formed inside the womb from start till birth. Kind of looks like the conveyor belt of the human process. [Image source here and here]

How a train stays on the track while navigating turns.

This is how a train stays on its tracks while making a turn. Was first uploaded here and here. Please check video below with full explanation.