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Famous for his work in math, astronomy, nuclear engineering, and theoretical physics, Freeman Dyson has left his mark on almost every scientific discipline. He's won countless awards, and written numerous books on a wide range of topics both scientific and philosophical. One of his biggest contributions to science was the unification of the three versions of quantum electrodynamics invented by Feynman, Schwinger and Tomonaga. 10 years after moving to the U.S. he started working on the Orion Project, which sought to create a spacecraft with a nuclear propulsion system. STNG exposed the idea of a Dyson sphere to the masses, and his hypothetical plan for making a comet habitable with the help of genetically-engineered plants is a personal favorite. Mr. Dyson has graciously agreed give us a bit of his time in order to answer your questions. As usual, ask as many as you'd like, but please, one question per post.

theodp writes "In The Civil Heretic, the NYT Magazine takes a look at how world-renowned scientist Freeman Dyson wound up opposing those who care most about global warming. Since coming out of the closet on global warming, Dyson has found himself described as 'a pompous twit,' 'a blowhard,' and 'a mad scientist.' He argues that climate change has become an obsession for 'a worldwide secular religion' known as environmentalism. Dyson has been particularly dismissive of Al Gore, calling him climate change's chief propagandist and accusing him of relying too heavily on computer-generated climate models and promoting 'lousy science' that's distracting attention from more serious and more immediate dangers to the planet." Dyson himself wrote about the need for heretics in science not long ago.

eldavojohn writes "An academic paper on math [PDF] has been released by Paul Bressloff, resulting in much ado about the mathematical modeling of the brain's memory storage. The paper deals with specific receptors called AMPA and how memories are held while synapses still fire. Scientific American is running a more detailed report on the subject." From the article "At any given time, some AMPA receptors are moving inside the nerve cell where they are unable to receive signals. But to maintain memory, a number of AMPA receptors are anchored in place with what are known as scaffolding proteins, Bressloff said. The computer models examined how many AMPA receptors are anchored at the receiving area on the surface as opposed to those found elsewhere in the nerve cell. The more AMPA receptors that are anchored in place, the stronger the synapse."

l2718 writes "NTP has just won the latest round in its court battle against Research in Motion (makers of the Blackberry). Today's Order List from the US Supreme Court includes a denial of certiorary for RIM's appeal. This follows the Circuit Court of Appeals' denial of review en banc we have covered previously. As sometimes happens, the court nevertheless accepted amicus curiae briefs from several groups, including Intel and the Canadian government." The potential impact of this may mean the shutdown of Blackberry's network. I hope the crackberry addicts have lots of methadone onhand.

Phronesis writes "In "The Future Needs Us," Freeman Dyson reviews Michael Crichton's Prey. After disposing of the bad science (The Reynolds number of nanobots 'the size of red blood cells' would limit their top speed to 2 mm/sec, which would make it hard for them to swarm or chase people; Solar power would provide no more than 20 nanowatts, which would not be sufficient for the activities the book describes; etc.) he turns to the more general theme of fearmongering about nanotechnology and biotechnology, comparing Prey to Nevil Shute's On the Beach ('Prey is not as good as On the Beach, but it is bringing us an equally important message')." Read on for a few more notes from the story, which makes an interesting followup to reader cybrpnk2's positive review of Prey .

"Dyson notes Joy's oddly prescient comment in April 2000 that

I think it is no exaggeration to say we are on the cusp of the further perfection of extreme evil, an evil whose possibility spreads well beyond that which weapons of mass destruction bequeathed to the nation-states, on to a surprising and terrible empowerment of extreme individuals.

but objects to Joy's recommendation that we should 'relinquish pursuit of that knowledge...so dangerous that we judge it better that [it] never be available.' After a discussion of the actual history of biological warfare and bioterrorism, Dyson quotes Milton's Areopagitica in defense of intellectual and scientific freedom, concluding that 'Perhaps, after all, as we struggle to deal with the enduring problems of reconciling individual freedom with public safety, the wisdom of a great poet who died more than three hundred years ago may still be helpful.'"

prostoalex writes "Every four years the Fields Medals are awarded to top mathematicians for outstanding research. This year's winners, as this San Francisco Chronicle article reports are Vladimir Voevodsky from Institute for Advanced Study and Laurent Lafforgue from Institut des Hautes Etudes Scientifiques. 'True to form, Lafforgue and Voevodsky's mathematical research has no known practical applications', notes SF Chronicle."