Where is a good place to find a petroglyph?

What did the cactus look like 100 years ago? What is prenom? Are mummies zombies? What allowed early humans to move from continent to continent? Where did ice age people SLEEP? Where is the peter iredale crash site? What did Aztec farmers wear? What does osteosarchaematosplanchnochondroneuromuelous mean? Who is Otak in Maroo? Early man's weapons pictures? What food and livestock from the rest of the world traveled to the America? What was the largest land animal during that ice age? What is Pan's animal? What was the climate like when the pawnee tribe lived in Oklahoma? What do Paul Bunyan and Pecos Bill have in common? What animals were associated with the societies that used seed agriculture? What is the gestation period of a megalodon? How fast can woolly mammoths run? What is carbon film? What does prupta mean?