1. Andrei E. Zlobin
Quasi Three-dimensional Modeling of Tunguska Comet Impact (1908)

The mechanism of Tunguska blast is determined as quick destruction of four main fragments of the comet in dense atmosphere. The structure of comet is determined, its substance and final size of each fragment. Detailed explanation of thermal damages due to explosion is described. More accurate coordinates of regions are obtained on the area of Tunguska site, where the most heavy sediments or fragments are possible to discover. Quasi three-dimensional modeling of the impact was produced with the help of PIC-method. It was shown that Tunguska-size comets are able to penetrate considerable deep into dense atmosphere due to decrease of drag effect. This decrease is explained by forward-directed jet from cavern of ice body, which located at the region of stagnation point. There is additional information for emergency organizations for training of people against comets and asteroids danger, its mechanical, thermal and electromagnetic influence.

2. Andrei E. Zlobin
Tunguska similar impacts and origin of life

The author suggests new vision of mechanism of initiation of life on the planets after Tunguska similar impacts. This mechanism takes into consideration not only incoming cosmic organic substance but also information, which is connected to this substance. Mathematical metrics of atom of hydrogen is deduced which may be used for pattern recognition algorithm. In accordance to author's opinion, similar algorithm can promote evolution (transformation) of inert organic substance into living substance. The fact of a survival of vegetation after the Tunguska event is analyzed especially. Also the author checked up his probably Tunguska meteorites by strong magnet. The presence of magnetic substance was detected with concentration of 10-2 % during this test.

3. Andrei Zlobin
Discovery of probably Tunguska meteorites at the bottom of Khushmo River's shoal

The author describes some stones which he found at the bottom of Khushmo River's shoal during 1988 expedition into the region of the Tunguska impact (1908). Photos of stones are presented. Three stones have traces of melting and the author consider these stones as probable Tunguska meteorites. Some arguments are presented to confirm author's opinion. Results of investigation of prospect holes in peat-bogs are briefly described too. New data concerning heat impulse of the Tunguska impact are obtained. There is the assumption that some meteorites which are formed during comet impact looks like stony or glass-like thin plates with traces of melting.

4. Trevor Palmer
The Tunguska Event and the Threat from Near-Earth Objects, Nottingham Trent University, 2009

This talk, given 101 years after the explosion of an object, generally believed to have been a small asteroid or comet, over the Tunguska region of Siberia, flattening 80 million trees in an area of 2000 square kilometres, begins with contemporary reports from around the world that something unusual had taken place. It continues with an account of expeditions sent into that remote region over the next few decades to try to determine what exactly had happened. The focus then turns to a more general consideration of the threat to the Earth posed by asteroids and comets, particularly those in orbits which bring them close to us, and so are known as Near-Earth Objects (NEOs).

5. Trevor Palmer
Perilous Planet Earth Revisited, Chronology and Catastrophism Review 2018:2, pp. 3-19

6. Laura Knight-Jadczyk
Tunguska, the Horns of the Moon and Evolution

- ( 110- 1908 )

8.Mikhail Kovalyov, Tunguska explosion revisited.

9. William I Thompson III, Cosmic Catastrophism Affecting the Earth - Bibliography and Handbook