Panspermia

Swedish astronomer, chemist and physicist (1859–1927)

British molecular biologist, biophysicist, neuroscientist; co-discoverer of the structure of DNA

British astronomer (1915–2001)

thumb |upright=1.3 |Panspermia proposes that organisms such as [[bacteria, complete with their DNA, could be transported by means such as comets through space to planets including Earth.]] Panspermia () is the hypothesis that life exists throughout the universe, distributed by cosmic dust, meteoroids, asteroids, comets, and planetoids, as well as by spacecraft carrying unintended contamination by microorganisms, known as directed panspermia. The theory argues that life did not originate on Earth, but instead evolved somewhere else and seeded life as we know it.

Austrian astrophysicist (1920-2004)

phenomenon observed sporadically during the summers in the southern Indian state

British chemist (1927–2007)

astronomer

Hemolithin (sometimes confused with the similar space polymer hemoglycin) is a proposed protein containing iron and lithium, of extraterrestrial origin, according to an unpublished preprint. The result has not been published in any peer-reviewed scientific journal. The protein was purportedly found inside two CV3 meteorites, Allende and Acfer-086, by a team of scientists led by Harvard University biochemist Julie McGeoch. The report of the discovery was met with some skepticism and suggestions that the researchers had extrapolated too far from incomplete data.