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Posts Tagged ‘Niels Bohr

“The missing link in cosmology is the nature of dark matter and dark energy”*…

 

Familiar visible matter can be thought of as the privileged percent—actually more like 15 percent—of matter. In business and politics, the interacting 1 percent dominates decision making and policy, while the remaining 99 percent of the population provides less widely acknowledged infrastructure and support—maintaining buildings, keeping cities operational, and getting food to people’s tables. Similarly, ordinary matter dominates almost everything we notice, whereas dark matter, in its abundance and ubiquity, helped create clusters and galaxies and facilitated star formation, but has only limited influence on our immediate surroundings today…

The common assumption is that dark matter is the “glue” that holds together galaxies and galaxy clusters, but resides only in amorphous clouds around them. But what if this assumption isn’t true and it is only our prejudice—and ignorance, which is after all the root of most prejudice—that led us down this potentially misleading path?…

Indeed,  Harvard theoretical physicist and cosmologist Lisa Randall asks, “Does dark matter harbor life?

* Stephen Hawking

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As we reach reflexively for a flashlight, we might send particular birthday greetings to Abraham Pais; he was born on this date in 1918.  After earning his Ph.D. in physics in Holland five days before a Nazi deadline banning Jews from receiving degrees, he went into hiding– and worked out ideas in quantum electrodynamics (later shared with Niels Bohr) that became the building blocks of the theory of elemental particles.  He was later a colleague of Robert Oppenheimer and Albert Einstein at the Institute for Advanced Studies at Princeton.

Pais was also an widely-respected historian of science.  Among his many works were a biography of Bohr and (the work for which he’s best remembered as a historian) Subtle Is the Lord: The Science and Life of Albert Einstein, which is considered the definitive Einstein biography.

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Written by LW

May 19, 2017 at 1:01 am

Monsters of Grok…

 

From Amorphia Apparel:

Fake band t-shirts for history’s greatest minds:  I don’t know about you, but I think science and philosophy are pretty bad ass, so join me in rocking out with some the most influential thinkers of all time!

More sagacious shirts at Amorphia Apparel

 

As we opt for ring-spun wisdom, we might wish a thoughtful Happy Birthday to cognitive and computer scientist John McCarthy; he was born on this date in 1927.  A recipient of the Turing Award, McCarthy coined the phrase “Artificial Intelligence” (in a 1955 proposal for a 1956 Dartmouth conference), founded the first A.I. Lab (at MIT in 1958), and created LISP (List Processing Language), the computer language most commonly used in AI research.

In 1961, McCarthy was the first to imagine and propose a future in which computers could be shared by multiple users, and computing could be provided as a utility.  The idea was popular in the late 60s, then waned in the 70s, as it became clear that hardware and software weren’t (yet) up to the task.  But with the new millennium, McCarthy’s concept retook the fore– and in the last few years, rose to The Cloud…

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