Healthy plants reflect more near-infrared light than stressed plants, so bright red indicates dense, growing foliage. For this reason, biologists and ecologists occasionally use infrared cameras to photograph forests.
Trilobites may be the archetypal fossils, symbols of an archaic world long swept beneath the ruthless road grader of time. But we should all look so jaunty after half a billion years.
Introducing your students to Scratch will provide your students with hands-on opportunities to think creatively, solve problems and work collaboratively. Scratch is a visual programming platform created at the Massachusetts Institute of Technology (MIT) by the Lifelong Kindergarten Group at the MIT Media Lab and is available to all users free of charge. This web-based tool is designed for students ages 8 to 16 but used by people of all ages. With Scratch, you can program your own interactive stories, games, and animations - and share your creations with others in the online community.
In recent years, Claverie and his colleagues have discovered a host of giant viruses, which are as big as bacteria but lack characteristic cellular machinery and metabolism of those microorganisms. At least one family of these viruses likely evolved from single-celled parasites after losing essential genes, although the origins of other giant viruses remain a mystery, Claverie said.