Tópico: Desafio: 5 avanços da ciência

[Dr. Manhattan]

Roubado do LiveJournal de James Nicoll:

Today's challenge to the pixel-stained technopeasants of the interweb
Name five things we didn't know in the year that you were born that make the universe a richer place to think about:

1: The icy worlds are a lot more interesting than we thought they were in 1961 (In fact, somewhere or other I have an essay from the pre-Voyager 1970s that wasn't sure if the small worlds out beyond the frost line had significant amount of water). If I felt like cheating, I could get all five points just from this catagory, from the volcanos on Io to the centrifugal elongation of EL61. I'd much rather have the icy worlds we do have to the collection of tedious lunar knock-offs some thought we might have.

[Do I need a disclaimer admitting that our current understanding of the Moon might be incomplete?]

2: When I was born, we knew very little about the actual behavior of other primates. Some of what we have learned isn't pleasant but it is informative. While it is true that this new knowledge carries with it the inevitable doom of a thousand bad analogies based on a superficial understanding of bonobo behavior, this can be addressed with education and stout clubs.

3: Speaking of biology, when I was born, MacArthur and Wilson's The Theory of Island Biogeography wouldn't be published for another six years.

4: Our expectations for what typical stellar systems might look like turns out to be hopelessly unimaginative.

5: We now know that a life-bearing world can lose the majority of its multi-cellular species and still recover. In fact, it looks to me like the world's life as a whole might be more robust (and the extant species are more various) now than it was back in the Permian, which I am sure will come in handy.

(ele também mostra uns gráficos interessantes sobre biodiversidade desde 542 milhoes de anos até hoje).
fonte: http://james-nicoll.livejournal.com

Deixa ver... 5 avanços surpreendentes desde 1973... Ok.

1) A expansao do universo está acelerando!

2) Fullerenos e nanotubos de carbono

3) Os dinossauros sao os ancestrais das aves.

4) Loop Quantum Gravity (antes que alguem cite supercordas:))

5) Polymerase Chain Reaction.

Escolhi esses 5 nao só pelo fator "Uau!", como também pelas suas consequências para nossa visao do
mundo e por nao estarem na outra lista acima. O 4 ainda nao deu frutos, mas acho interessante mesmo assim.
No item 2 eu podia ter incluído também a produçao de grafeno  .

[Diego]

Oq é fullerenos e grafeno??

oq é Polymerase??

[Dr. Manhattan]

Diego, eu adoraria explicar isso direito pra você, mas está ficando meio tarde por aqui. Mas como sempre, a
wikipédia está aqui para nos ajudar:
http://en.wikipedia.org/wiki/Fullerenes
http://en.wikipedia.org/wiki/Polymerase_chain

Nos dois casos, as descobertas valeram prêmios Nobel.
Abraços.

P.S. Grafeno é um nanotubo de carbono "desenrolado".

[Herf]

PCR ou "polymerase chain reaction" é uma técnica descoberta na década de 80 por Kary Mullis que consiste em fazer cópias de um determinado gene de uma molécula de DNA. Para isso, usa um aparelho chamado termociclador de PCR.

De um modo grosseiro, você joga em um tubo de ensaio a molécula de DNA que tem o gene que você quer replicar, juntamente com outras substâncias (como nucleotídeos) e a tal da polimerase, a principal enzima envolvida na replicação do DNA. Você coloca isso no termociclador, e em pouco tempo tem no tubo de ensaio milhões de cópias do gene em específico.

Esta técnica foi revolucionária para a biologia molecular e, como foi dito, garantiu o prêmio Nobel a Mullis.

[Luis Dantas]

P.S. Grafeno é um nanotubo de carbono "desenrolado".

Ei, sem palavras chulas!

[Adriano]

Porquê só avanço tecnológico é considerado ciêntífico? Digo, são os que tem mais divulgação, mas serão os mais importantes?

[Dbohr]

Liste aí cinco desenvolvimentos interessantes de Humanas desde 197X; só vai enriquecer o debate

[Herf]

Acho que ele quis perguntar sobre avanços na ciência teórica, de base.

[n/a]

Roubado do LiveJournal de James Nicoll:

Today's challenge to the pixel-stained technopeasants of the interweb
Name five things we didn't know in the year that you were born that make the universe a richer place to think about:

1: The icy worlds are a lot more interesting than we thought they were in 1961 (In fact, somewhere or other I have an essay from the pre-Voyager 1970s that wasn't sure if the small worlds out beyond the frost line had significant amount of water). If I felt like cheating, I could get all five points just from this catagory, from the volcanos on Io to the centrifugal elongation of EL61. I'd much rather have the icy worlds we do have to the collection of tedious lunar knock-offs some thought we might have.

[Do I need a disclaimer admitting that our current understanding of the Moon might be incomplete?]

2: When I was born, we knew very little about the actual behavior of other primates. Some of what we have learned isn't pleasant but it is informative. While it is true that this new knowledge carries with it the inevitable doom of a thousand bad analogies based on a superficial understanding of bonobo behavior, this can be addressed with education and stout clubs.

3: Speaking of biology, when I was born, MacArthur and Wilson's The Theory of Island Biogeography wouldn't be published for another six years.

4: Our expectations for what typical stellar systems might look like turns out to be hopelessly unimaginative.

5: We now know that a life-bearing world can lose the majority of its multi-cellular species and still recover. In fact, it looks to me like the world's life as a whole might be more robust (and the extant species are more various) now than it was back in the Permian, which I am sure will come in handy.

(ele também mostra uns gráficos interessantes sobre biodiversidade desde 542 milhoes de anos até hoje).
fonte: http://james-nicoll.livejournal.com

Deixa ver… 5 avanços surpreendentes desde 1973… Ok.

1) A expansao do universo está acelerando!

2) Fullerenos e nanotubos de carbono

3) Os dinossauros sao os ancestrais das aves.

4) Loop Quantum Gravity (antes que alguem cite supercordas:))

5) Polymerase Chain Reaction.

Escolhi esses 5 nao só pelo fator "Uau!", como também pelas suas consequências para nossa visao do
mundo e por nao estarem na outra lista acima. O 4 ainda nao deu frutos, mas acho interessante mesmo assim.
No item 2 eu podia ter incluído também a produçao de grafeno  .

Puxador de sardinha!