Sadly, no. Dinosaurs are distinct so they will not come back to earth.
Ghosts come back to earth to visit their house or to do things that they didnt finish. Ghosts probably come back to visit someone that they loved.
Only in his spirit form. :(
no
they make the evil spirit angry
July 21,1969
All the Travelers in Pendragon come back to life. Except for Nevva Winter, who's spirit has ended.
she comes back as a vampire, then a spirit but changes into a full human but can still sometimes use her white spirit power[good power]
the earth isn't really going to 'end.' Jesus is going to come back and take his believers to Heaven and make a new heaven and a new earth
Apollo 13 came back to earth on the 17th of April 1970.
Gravity
Rain