“NASA will hold a news conference
at 2 p.m. EST (11am PST) on Thursday, Dec. 2, to discuss an astrobiology finding that will impact the search for evidence of extraterrestrial life. Astrobiology is the study of the origin, evolution, distribution and future of life in the universe.” Watch it HERE
live. [more inside]
posted by Sprocket
on Dec 1, 2010 -
The "Great Filter
" is a hypothetical barrier to explain why civilisations are so unlikely to progress to the point of inter-stellar colonisation that we have not encountered any in 40 years of looking. Maybe humanity has already negotiated the filter - as some massive evolutionary improbability - or perhaps it lies in our future as an almost-certain threat to our existence? We should hold our breath as we look for evidence of life on Mars
posted by rongorongo
on May 12, 2008 -
- an interesting read on artificial life
and evolutionary computation
, from the game of life
), through core wars
and on to genetic programming
. This approach has recently borne fruit to genetic programming pioneer
and inventor of the scratchcard
, John Koza
, who last year patented his invention machine
, actually a 1000 machine beowulf cluster
running his software, which has itself created several inventions
which have been granted patents.
[See also: BBC Biotopia artificial life experiment
, another odd BBC evolution game
, Artificial Life Possibilities: A Star Trek Perspective
posted by MetaMonkey
on May 3, 2006 -
The origin of life?!
I heard from an authority in molecular biology today that a group of researchers funded by the Carnegie Institution and NASA believe they've discovered the origin of RNA
, and with that, the origin of life.
This new discovery grew out of NASA's Deep Impact
mission to study the composition of comets. Specifically, they started investigating a kind of carbon that forms in layers, with each layer slighly offset from the previous one in a helix shape. Significantly, the thickness of these carbon layers corresponds with the thickness of each twist in a strand of RNA.
It turns out that the individual building blocks of RNA are capable of bonding to this layered carbon when exposed to UV radiation. Once this has happened, apparently formaldehyde
can then bond to the building blocks of RNA on the carbon "pattern", allowing the bonded RNA to slough off into the primordial soup. Over time, some of these RNA strands could fold and bond to themselves, forming DNA. Formaldehyde, the initial bonding material, would eventually be replaced by a more chemically sophisticated substance, creating the chemical bond that we observe today in DNA.
Expect a paper on it to be released in approximately three months with all the details.
posted by insomnia_lj
on Nov 6, 2005 -
Did the discovery of evolution lead to Darwin's agnosticism, as claimed
? Carl Zimmer wonders
. More importantly, can evolution be reconciled
posted by daksya
on Aug 11, 2005 -