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Traveling is extremely arduous for microscopic sperm -- think of a human trying to swim in a pool made of...other humans. We can compare the journey of a sperm to that of a sperm whale by calculating the Reynolds number, a prediction of how fluid will behave, often fluctuating due to size of the swimmer. Aatish Bhatia explores the great (albeit tiny) sperm's journey.
- Subjects:
- Physics
- Keywords:
- Fluid dynamics Sperm whale Spermatozoa
- Resource Type:
- Video
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Video
Bees have been rapidly and mysteriously disappearing from rural areas, with grave implications for agriculture. But bees seem to flourish in urban environments -- and cities need their help, too. Noah Wilson-Rich suggests that urban beekeeping might play a role in revitalizing both a city and a species.
- Subjects:
- Environmental Sciences and Biology
- Keywords:
- Honeybees
- Resource Type:
- Video
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Video
What does the health of a region's animal population say about the health of the local humans? More than you'd think, argues Tracey McNamara. As an expert in zoonotics -- the study of diseases that can be transmitted between animals and humans -- McNamara explains how paying attention to animal disease patterns could have predicted events like the 1999 West Nile Virus outbreak and stresses the need for global health agencies to start monitoring animals just as closely as they do people.
- Subjects:
- Health Sciences
- Keywords:
- Communicable diseases in animals Public health Zoonoses
- Resource Type:
- Video
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Video
As we keep pumping carbon dioxide into the atmosphere, more of it is dissolving in the oceans, leading to drastic changes in the water's chemistry. Triona McGrath researches this process, known as ocean acidification, and in this talk she takes us for a dive into an oceanographer's world. Learn more about how the "evil twin of climate change" is impacting the ocean -- and the life that depends on it.
- Subjects:
- Environmental Sciences and Chemistry
- Keywords:
- Marine pollution Oceanography
- Resource Type:
- Video