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This video follows scientists working in Bangladesh as they test fruit bat populations to determine whether they are infected with Nipah virus, a potentially deadly human pathogen.

This film explores how the genetic and anatomical legacy of a fish can be seen today in the human body.

This film explores what our hair, teeth, and hearing reveal about our evolution from ancient reptilian ancestors.

This video shows the reactions of first-grade students to a replica of a Tiktaalik fossil.

This film tells the story of the scientific quest to explain one of the greatest, long-standing scientific mysteries: the sudden disappearance of the dinosaurs at the end of the Cretaceous period.

This animation provides an overview of the greenhouse effect, a process that warms the atmosphere and surface of Earth.

This animation shows how varying concentrations of a signaling molecule activate different transcription factors to determine cell fate.

This animation shows how stem cells from early mammalian embryos can be grown and studied in a laboratory.

This animation describes the formation and fates of the three germ layers in a human embryo.

This animation shows how salamanders can replace missing limb tissues with the help of cells similar to stem cells.

This animation shows how tumors use the protein VEGF to recruit blood vessels.