Could Io, one of Jupiter’s four brightest moons, be billions of years old??
“Io is the most volcanically active body in the solar system. One scientist, writing in the journal Science, calculated that if Io had been erupting over the assumed billions of years, at only 10% of its current rate, it would have erupted its entire mass 40 times over by now.”
Read more here: https://creation.com/planets-jupiter