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The North Pacific gray whale has been called an "ecosystem sentinel" because it appears this species responds to large-scale environmental changes. Global climate change may ultimately make the biggest impact on these ocean giants. Join us as special guests Wayne Perryman and Dave Weller of Southwest Fisheries Science Center (NOAA) discuss how novel information on gray whales is reshaping scientists' understanding of this species.

Telomeres are the chromosomes end-part, that are needed to protect chromosome ends. Due to the way chromosomes are copied, these telomeres shorten with each round of cell division. This shortening is kept in check by the enzyme telomerase which elongates telomeres. However because of the limited amount of telomerase, telomere shorten with age in humans. People who cannot effectively elongate telomeres may show manifestations of a Telomere Syndrome, which include age-related diseases such as bone marrow failure, immune senescence and pulmonary fibrosis. Carol Greider, 2009 Nobel Laureate and professor at Johns Hopkins University, discusses how the seemingly benign structure on chromosome ends can underlie human disease. Recorded on 03/04/2014.

Computers are becoming an increasingly cheaper, more powerful tool that cannot be ignored by professionals. Computer simulation reproduces the behavior of natural and man-made systems to help us understand, predict, and communicate. Vic Castillo, a research engineer at the Lawrence Livermore National Laboratory, shows how computer simulation is used by LLNL scientists on the world's fastest computers. See how you can get started doing your own computer simulations with free, open-source tools for class projects or just for fun.
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