It has definitly been more than once since there has been earth for about 4.5 billion years. The most recent is Pangea
Look for the answer between the late cosmos in early spring
50 times
2600000000000000000
Space probes leave Earth, they do not go toit.
It has never been explored by humans and never will.
No person has ever 'explored' any planet, besides Earth. Several people have been to the moon. Unmanned vehicles have been to Mars. Mankind has only 'explored' other planets visually.
saturn has only been visited 4 times by spacecrafts
Magically 2
yes many times
The last fossil on earth has not yet been discovered. There are probably many, many times more left than have been found so far.
It has definitly been more than once since there has been earth for about 4.5 billion years. The most recent is Pangea
Look for the answer between the late cosmos in early spring
There are 115 Tepuis in Venezuela; many have never before been explored. Source:Wikipedia
Not all have been charted, explored and counted, but there are many thousands of various sizes.
the earth is 3000 times biggeer
we don't know as we haven't found them.