I’m interested in paleontology so I want to know if there is a Stack Exchange for paleontology. And if there is, please provide me the name and link.
Depending on your question, there are a few places you could try:
For "general questions about biological concepts"
"If your question is about meteorology, geophysics, geology, climatology, oceanography, geochemistry, or hydrology, then you are in the right place. The above list is not exhaustive, so if you feel your question is about earth science, go ahead and post it."
For questions about the astronomical event that wiped out a lot of prehistoric life.
As always, read the per site Help pages, and if you're still unsure your question is appropriate, you can ask on their respective meta sites.