The forgetful mindless mob that is the internet is making viral these images of animals in the womb from the 2011 National Geographic program of the same name. I don't blame her, because they are so impressive they should go viral on a monthly basis.
The images were created for Animals in the Womb using a combination of different techniques: "four-dimensional scanning technology, computer graphics and tiny cameras to capture the process from conception to birth."
See if you can recognize all of them:
Here's a trailer of the series, which is a must watch: