  It is suggested that the Tunguska event in June 1908 cm-large was due to a
cm-large ball of a condensate of bound states of 6 top and 6 anti-top quarks
containing highly compressed ordinary matter. Such balls are supposed to make
up the dark matter as we earlier proposed. The expected rate of impact of this
kind of dark matter ball with the earth seems to crudely match a time scale of
200 years between the impacts. The main explosion of the Tunguska event is
explained in our picture as material coming out from deep within the earth,
where it has been heated and compressed by the ball penetrating to a depth of
several thousand km. Thus the effect has some similarity with volcanic activity
as suggested by Kundt. We discuss the possible identification of kimberlite
pipes with earlier Tunguska-like events. A discussion of how the dark matter
balls may have formed in the early universe is also given.
