Why does an egg float in salt water? Learn about density and buoyancy in this video segment adapted from ZOOM.

This lesson integrates science, math, communication skills, arts, and social studies through hands-on activities. Students are directly involved in hatching baby chicks.

In the north Atlantic, the American Lobster is the undisputed king of crustaceans. It‰ŰŞs also a tremendously important commercial catch. While all the other fisheries are collapsing, why are lobsters resisting the trend? In this video, Jonathan goes out with a Maine lobsterman to learn why, and he dives down below to find the biggest lobsters he has ever seen. This segment won a New England Emmy Award! Please see the accompanying study guide for educational objectives and discussion points.

Thanks to the Disney/Pixar movie "Finding Nemo", virtually everyone has heard of the clownfish. In this video, Jonathan travels the Pacific to investigate the behavior of real clownfish. Even though they don't actually talk in real life, they are beautiful and fascinating fish to observe. Please see the accompanying lesson plan for educational objectives, discussion points and classroom activities.

They have big, sharp teeth, long eel-like bodies, and they look like they could bite your fingers right off‰ŰÓbut Jonathan can pet them. They‰ŰŞre Wolffish, and in this video Jonathan visits both Atlantic and Pacific species. You won‰ŰŞt believe the amazing encounters he has with these friendly but mean-looking fish. Please see the accompanying study guide for educational objectives and discussion points.

This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:

"Farmed chickens often suffer from intestinal inflammation which negatively affects their feed intake, digestion, and growth performance. The gut microbial community has a known close relationship with growth performance, but how, or if, this microbiota influences intestinal inflammation is not yet known. To test this, researchers examined the microbiota in young chickens, focusing on the jejunum section of the gut. They found that 7-week-old chickens with high body weight tended to have a microbiota dominated by gram-positive bacteria, like Lactobacilli. But lower-body-weight chickens had a microbiota dominated by gram-negative bacteria, like Escherichia-Shigella. Gram-negative bacteria carry endotoxin (lipopolysaccharide), and consequently, these lower body weight chickens had more of it in their bloodstream. These elevated lipopolysaccharide levels activated inflammatory cytokines in the jejunum, causing damage to the gut barrier..."

The rest of the transcript, along with a link to the research itself, is available on the resource itself.