8. Troodon
What could be weirder than an herbivore that is almost a literal Edward Scissorhands? Try a dinosaur that has spawned conspiracy theories.
At first glance, Troodon looks less intimidating than the Velociraptors from Jurassic Park. It’s small – roughly 2 meters. Like the Raptors, Troodon had sickle claws. It also had serrated teeth that may suggest an omnivorous diet, rather than these dinosaurs being just meat-eaters. It had binocular vision, and huge eyes, so we know it was hunting something – possibly in a cold, dark climate.
The biggest thing that stands out about Troodon, at least to paleontologists, is its brain size. There’s a certain ratio that lets one determine how intelligent a creature is. According to the measurements, Troodon may have been as smart as a chicken, which is miles above other dinosaurs. (Side-note: every video game that has a Troodon will acknowledge that these guys were dinosaur geniuses, relative though that may be.)
Given its intelligence and adaptations, a rather interesting crop of theories has sprung up around Troodon. There are some theorists – not just bloggers, but paleontologists – who speculate on what might have happened if Troodon had survived the K-T extinction event. Had Troodon kept going on its path, it may have evolved into a reptilian-humanoid – a “reptoid,” if you will.

Source: http://alienresearch.wikia.com/wiki/Reptoid
Allow me to summarize the varieties of craziness that surround reptoids. If we want to be scientific and speculate that Troodon may have lived, the reptoids probably shun human contact, preferring remote areas such as unexplored rainforests or underground places such as caves. Others say that the K-T event was a cover-up and that reptoids not only lived but walk among us disguised as humans. Take these ideas as you will.
In other words, the weirdest dinosaur isn’t the one with the bony skin, huge claws, or impressive frill, but the one that is most like us. If any reptoids are reading this, please be kind to the human species. Revealing yourselves as dinosaurs would only make us love you more.