How did life come into

existence ?

BASED ON WHICH THEORY?

1. H.E.Ritcher-meteors/comets theory

2. Gyon De- moon theory

3.Svante Arrhenius- panspermia theory

It’s THE PANSPERMIA theory!

-The theory which states that life on earth originated from microorganisms present in outer space.

History of the

Panspermia theory

Types of panspermia theory

1.Lithopanspermia

2.Ballistic panspermia

3.Directed panspermia

METEOR

The microorganisms and amino acids were supposed to be seeded on the

meteors which came from other planets to earth!

WHY ONLY EARTH

ATMOSPHERE

CLIMATE

WATER

SUN

EVIDENCE

Bacteria can survive harsh environment of space like

Ultra violet radiationProtons bombardmentcold

Meteorites contain:

Amino acids (left handed in helicity)

Bacteria

Carbon are protected inside the rocks.

Bacteria can live for a long time in sleep state until awakened.

Recent supportMeteors about 15 million years aged was found in Antarctica in 1984 by a team of scientists of annual United States government mission to search for meteors.

MODERN PANSPERMIA

Meteors act as the delivery devices

Possibilities of earth launching satellites

capable of transferring microorganisms in the

near future!!

REFERENCE

Challenges to darwinism-panspermia and the theories of evolutionBy Gerry Zeitlin

PRESENTED BY

FATIMA SHIVANI POONAM SAICHANDER

THANK YOU…