Planetary Chauvinism vs the

Monart Pon wrote,

"The human species has survived many "accidents" and catastrophes in the
past,
from the World Wars of the last century, to the Plague in medieval Europe,
to
the planetary collisions of Mars and Venus in 1500 BC, described by
Immanuel
Velikovsky.
"

What respected astronomer believes that Mars and Venus collied? Give me
a break. No, I don't believe that aliens built the pyramids, either!

Ron