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Public lectures given at the Institute for Advanced Study. Suppose that G is a connected, quasisplit, orthogonal or symplectic group over a field F of characteristic 0. We shall describe a classification of the irreducible representations of G(F) if F is local, and the automorphic representations of G in the discrete spectrum if F is global. The classification is by harmonic analysis and endoscopic transfer, which ultimately ties the representations of G to those of general linear groups.

Polar Wander. + Author Affiliations Abstract We present new paleomagnetic data from three Middle Neoproterozoic carbonate units of East Svalbard, Norway. The paleomagnetic record is gleaned from 50 to 650 m of continuous, platformal carbonate sediment, is reproduced at three locations distributed over >100 km on a single craton, and scores a 5–6 (out of 7) on the Van der Voo (1990) reliability scale. Two >50° shifts in paleomagnetic direction are coincident with equally abrupt shifts in δ13C and transient changes in relative sea level.

Relative Sizes

Technology. 3D Map of the Brain. We knew anatomy could be gorgeous, but this is beyond anything else we’ve ever seen, and it’s guaranteed to be something you haven’t seen, being the first 3D image of a brain’s connections.

3D Map of the Brain

Van Wedeen, a Harvard radiology professor, is awestruck: “We’ve never really seen the brain – it’s been hiding in plain sight.” Conventional scanning has offered us a crude glimpse, but scientists such as Wedeen aim to produce the first ever three-dimensional map of all its neurons. Cool Science Experiment.

Cool Science Experiment. Retired Site The Wired Science site has been retired from pbs.org and is no longer available.

Cool Science Experiment

To find similar science and technology content on pbs.org, explore our Technology and Science & Nature topics areas. Or, try our keyword search or browse the Programs A-Z menu. Educators can find science-related, digital resources — videos, interactives, audio and photos — and in-depth lesson plans for the classroom at PBS Learning Media. Planetarium. Absolute Zero. How LowCan You Go?

Absolute Zero

In our virtual lab, use the "cascade" process to achieve dramatically lower temperatures. States of Matter Adjust temperature and pressure, and watch as gases become liquids, liquids harden into solids, and more. A Matter of Degrees Create your own temperature scale, then see how it compares to those of Fahrenheit and Celsius.

Anatomy of a Refrigerator You likely have one, but do you know how it works? The Ice Trade In this game, dispatch 10 ships loaded with natural ice to Florida, Brazil, or India.

Space