Giorgio Bianciardi

University of Siena

19761976Viking #1Viking #1Viking #2Viking #2

Life on Mars ?Life on Mars ?

ALH84001ALH84001 Life on Mars (billion years ago)?!Life on Mars (billion years ago)?!D.S. Mc Kay, Science, 1996D.S. Mc Kay, Science, 1996

PAHPAH

Jupiter moonsJupiter moons

Titan: a Saturn moonTitan: a Saturn moon

Fermi’s paradox: where are they?

Liquid water & Time

= 1:10050%

5%

90%

Extrasolar planets

Stable orbits

= 1: 10 000..planets were life

could arise…

Life is rare / Intelligent life is very and very rare