A lot of times memes are what they are because they're harder to fact check (can't copy and paste text from them). People use them to spread misinformation for fun. -This is actually a confirmed meme though.
Except for a couple of details from the link you posted: there were only two worms, and they are likely of the same age (don't think this can be determined more specifically than 'around 40 thousand years'), and the picture is absolutely wrong.