HS-LS1-2
Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.
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AnimalsKangaroos have ‘green’ farts
The farts and belches of these animals contain less methane than do those from other big grass grazers. Microbes in their digestive tract appear to explain the ‘roos lower production of this greenhouse gas, a new study finds.
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Health & MedicineTeen finds the ‘shape’ of our beating hearts
Kevin Lee used math to probe how the shape of a beating heart relates to electrical signals from the brain. He unveiled it at the 2014 Intel Science Talent Search.
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Health & MedicineSimple test for cancer and heart disease
Disease diagnosis often requires expensive equipment and tests to probe deep inside the body. But a new test relies on a fast, cheap and easy technique. And its answers appear on a strip of paper — just as they do on a pregnancy test.
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AnimalsDissecting the dog paddle
Scientists occasionally describe the dog paddle as a “trot,” but that’s not right. When dogs swim, their complicated leg motions look more like a frantic run.
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