Do comets collide with planets?

In 1910, the Earth passed through the tail of Halley’s comet, but this had no effect on the Earth and its inhabitants.
According to one of the hypotheses, the Tunguska body, which collided with the Earth in 1908, was the nucleus of an unusual comet.
According to observations of the Earth from space, it was found that in one minute 20 ice comets with an average diameter of 10 m flies into the Earth’s atmosphere, each of which brings 100 tons of water.
In the summer of 1994, fragments of comet Shoemaker-Levy 9 collided with Jupiter.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.