Browsing 150 - 160 results of 263 programs for subject - Life Science/Biology
In our second Webcast with biologist Steve Hastings, we'll learn about his collaborative research experiment in Barrow. As the climate changes in the Arctic, the amount of water on the tundra is affected (more rainfall, shorter freeze periods, changing sea levels,etc). How will these changes effect the tundra's release of greenhouse gases? Will less permafrost mean more or less CO2 in the atmosphere? Will warmer temperatures cause more evaporation? Will that be good or bad for the environment? The Census of Marine Life is a growing global network of researchers in more than 70 nations engaged in a ten year (2000-2010) mission to assess and explain the diversity, distribution, and abundance of marine life in the oceans. Rolf Gradinger is an expert in Sea Ice Communities, studying the tiny animals that actually live inside the ice and those that live on the bottom of the ice sheets. We'll chat with Rolf about his current work, drilling ice cores just off Barrow, and looking for some of the world's most unique fauna. Meet Barrow scientist and Ice Stories blogger Steve Hastings, who is investigating how the tundra responds to climate change. What exactly is the tundra? How can vegetation, no more than 3 inches tall, play such an important role in the world's climate? Why does the tundra release so much CO2?
The Exploratorium's remote crew has landed in Barrow, AK, to showcase the vast array of science being conducted at this northernmost tip of the continent. Join us for this introduction to Barrow: where is it? why are so many scientists here? why are May and June such important times? How do cancer cells misbehave? Watch and listen as cancer researcher Dr. Thea Tlsty explains how genetic blips turn cancer cells into the rogues they are. From fertilization to pregnancy tests, watch and listen as Xenopus researcher Dr. Thierry Brassac shows how these creatures, with their enormous eggs cells and their acts of metamorphosis, have been helping scientists for centuries. The water-dwelling planaria can lose its head and regrow a new one. Watch and listen as planaria researcher Alejandro Sanchez Alvarado explains how a little flatworm's might teach us about our own regenerative potential. Hear stem cell researcher Bruce Conklin explain why this science is important and what it's like to watch newly grown heart cells beat in a culture dish late at night. A tattoo lasts a lifetime, thanks to your white blood cells. Watch and listen as researcher Mike McGrath explains how these warrior cells protect you from disease—and keep body art intact. What's so special about the sea urchin? Watch and listen as urchin researcher Fred Wilt describes the things he and others observe under the microscope.