Volcanic crater of Nyiragongo in Africa

Where in the 1960s the number of scientists working on impact craters were probably less than 20, now there are hundreds. More to the point, scientists and the general public now realize that impacts by extra-terrestrial bodies (asteroids, comets, meteorites) are genuine dangers to mankind, capable of causing catastrophes greater than any other natural process known to affect the Earth's surface.
Volcanic crater of Nyiragongo in Africa

Volcanic crater of Nyiragongo in Africa