MetaFilter posts tagged with Fermi

Does Your Answer Seem Right?

Electric Dragon — Wed, 01 Apr 2009 03:41:39 -0800

NYT Guesstimation Quiz. Enrico Fermi estimated the yield of the Trinity A-bomb test by dropping some shredded paper. He also asked his students to estimate unusual quantities like the number of piano tuners in Chicago - to show that just about anything can be estimated without detailed knowledge.

"It was beautiful, kind of like abstract art"

subbes — Wed, 16 Jul 2008 11:08:38 -0800

In March 2007, the FermiLab Office of Public Affairs in Batavia, IL "received a curious message in code" via USPS. In May 2008, scientists posted a facsimile image of the letter to their blog in the hopes of soliciting cryptologists to decipher the letter. A partial solution began to appear by the very next day. Geoff Milburn (creator of the Homebrew Air Conditioner and employee of the Canadian Space Agency) noted that the first and last paragraphs appeared to be in base-3 and base-2, and got to work. By the 17th, he had experimented with possible mappings and reached a solution. Meanwhile, John Graham-Cumming whipped up a Perl program to experiment with the mappings and posted his Perl-decrypted version. The text? "FRANK SHOEMAKER WOULD CALL THIS NOISE," and "EMPLOYEE NUMBER BASSE SIXTEEN." Two months later, the central paragraph remains unsolved, and a Chicago Tribune article has rekindled the web's interest, and spread work and comments on the mystery through blogs and forums. Too simple for you? Well, there's work still to be done on the Zodiac Killer's November 8 1969 cryptogram, the CIA's Kryptos sculpture (previously), the Voynich Manuscript (previously) and the Shugborough House Shepherd's monument inscription. And of course, there's always the Mayday Mystery (previously and previously).

Is life on Mars a good sign for us?

rongorongo — Mon, 12 May 2008 08:11:33 -0800

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.

Guess about 2 people will snark about this title

Gyan — Tue, 18 Oct 2005 10:49:02 -0800

A View from the Back of the Envelope - approximations and the fun behind them.

Beating Fermi by 1.7 billion years

blahblahblah — Wed, 16 Feb 2005 14:45:27 -0800

The site of the world's first nuclear reactor? Gabon. About 1.7 billion years ago several deposits of uranium in Oklo, Gabon spontaneously began to undergo nuclear chain reactions fed by small drips of water. These natural breeder reactors ran for almost a million years, producing both intense heat and plutonium byproducts. Aside from the strangeness of naturally occurring reactors, Oklo provides the only existing case of how highly radioactive waste behaves over a period of tens of millions of years -- exactly the problem faced by the DOE's Yucca Mountain nuclear waste site.

aurelian — Tue, 01 Aug 2000 13:00:09 -0800

Another thwack at answering Fermi's question. Which is, after scribbling a fairly convincing equation on the blackboard, "If there's intelligent life out in the universe, where are they?" An interesting sidelight is the principal donors: Paul Allen and Nathan Myhrvold of Microsoft... Both of whom are known for unverifibly abstract big-picture thinking, but maybe it'll pay off this time...