did triceratops exist?

As Scanella and Horner pointed out in their paper, and as multiple summaries of the study have stated, Triceratops (described in 1889) was named before Torosaurus (described in 1891). According to the rules by which scientists name organisms, this gives Triceratops priority, so the name “Triceratops” isn’t going anywhere. (TIME got it right, Love in the Time of Chasmosaurs tried to set people straight, and Geekosystem deserves some credit for amending their original post.) What is significant about the new study is that it may change our perception of what an adult Triceratops looked like, but the young-adult dinosaur we have traditionally called Triceratops is just as real as tadpoles, caterpillars, or teenage humans—they are all growth stages within a species

Read more: http://blogs.smithsonianmag.com/dinosaur/2010/08/relax-triceratops-really-did-exist/#ixzz2VG8n1gN6
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Triceratops trio unearthed in Wyoming

 The trio could be male and female and their young, or they could be two females looking after a juvenile dinosaur, he said. And before now, there was no indication that the Triceratops moved in groups.