The Problem of Regeneration: Part 3: Molecular Basis of Regeneration: Planarians as a Model System (43:54)

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In the third and last part of this lecture, I will introduce the model system we have developed to study animal regeneration, the planarian Schmidtea mediterranea. I will review its anatomy, and the biological attributes that make these animals extraordinarily well suited to dissect the molecular and cellular basis of regeneration. I will also discuss recent work from my laboratory aimed at identifying molecules associated with regenerative capacities.

The Problem of Regeneration: Part 2: Principles of Planarian Regeneration (32:49)

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In this second part of the lecture, I will briefly review the rich history of planarian research, followed by a summary of the central principles of planarian regeneration that have been derived from this extensive, often fascinating body of experimental work.

SDSU Geological Sciences Webinar - Greg Hirth

submitted by: tcarrasc
Understanding earthquakes at the microscopic scale: Greg Hirth, Geology & Gephysics, Woods Hole Oceanographic Institution - I will first review of how to relate rock strength determined from lab experiments to geological and geophysical observations - emphasizing apparent paradoxes and successes. I will then introduce why understanding earthquake mechanisms in the oceanic lithosphere can provide new insights into the rheological properties of fault zones, and present an experimental...

San Diego Science Festival -- Nifty Fifty -- Dr. Javier Movellan

submitted by: sdscienccefestival

Dr. Javier Movellan speaks to students of Sacred Heart Middle School about machine intelligence.

San Diego Science Festival -- Lunch with a Laureate -- Dr. Kurt Withrich

submitted by: sdscienccefestival

Nobel Laureate Kurt Wuthrich joins students of High Tech High - Chula Vista in an informal Q&A.

Stem Cells: Biology and Promise for Regenerative Medicine: Part 2: Tapping the Potential of Adult Stem Cells (1:17:03)

submitted by: scivee-team
Stem cells have both the capacity to self-renew, that is, to divide and create additional stem cells, and also to differentiate along a specified molecular pathway. Embryonic stem cells are very nearly totipotent, reserving the elite privileges of choosing among most if not all of the differentiation pathways that specify the animal. In contrast, stem cells that reside within an adult organ or tissue have more restricted options, often able to select a differentiation program from only a few...