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Classification Why do we classify things? * Classification provides scientists and students a way to sort and group organisms for easier study. * There are millions of organisms on the earth! (approximately 1.5 million have been already named) Organisms are classified by their: * physical structure (how they look) * evolutionary relationships * embryonic similarities (embryos) * genetic similarities (DNA) * biochemical similarities What is this thing called science? As a scientist, Evelyn Fox Keller hated experiments. Today a professor emerita in the History of Science at MIT, she started out her scientific career in theoretical physics before jumping to molecular biology. What got her was the trivial volatility inherent in experimentation. “Someone could brush by the thermostat on the water bath, and a months’ work would be down the drain. You didn’t have control over it.” The methods of theoretical physics better suited her.

Watch Online Please sign in using one of our supported services to begin saving your favorite programs and videos. We have updated our registration process. Please sign in using one of our supported services to bookmark your favorite programs and videos. 3 Ways to Get a Girl to Like You Get NoticedStay out of the Friend ZoneAsk Her Out Edited by Retro_xx, Nicole Willson, PeterD, Brett and 302 others Every woman is different; if they were all the same, you wouldn't be interested in this one in particular, now would you? There are as many different ways to attract a woman as there are women, so let's go over some basic rules that will win over any woman worth getting. Ad Steps

NOVA The 100-Year-Old Idea That Could Change Flight Inspired by birds, bats, and the Wright brothers, engineers are building the next breakthrough in aviation. From NOVA Next | Feb 22, 2017 Key Brain Regions Found To Be Smaller in People With ADHD Animal Adaptations Being able to adapt is a matter of life or death. Animals who can't adapt - die! For animals, adaptation is the idea that animals have developed features that help them to survive and thrive where they live. Some adaptations are purely physical. Fish have fins to help them swim and gills that let them breathe underwater.

Physical Review X Does Research on Foundations of Quantum Mechanics Fit into PRX’s Scope? October 24, 2014 The editors and Bill Poirier from Texas Tech University spotlight an original, thought-provoking paper by Hall, Deckert, and Wiseman on foundations of quantum mechanics, Phys. Rev. Earlychildhood NEWS - Article Reading Center Using photography in your classroom is a great way to record children’s field trips and special activities, document their block constructions, or identify their cubbies. Photos are also great motivators for involving children in making their own books and personalizing projects. Whether you own a film or digital camera, this article presents techniques to help improve the usefulness and effectiveness of the photographs that you take and to make photography a part of your curriculum every day. Why Photography is Important While children are in your care, their parents often miss important childhood events – first steps, first bite of solid food, discovery of oneself in a mirror, tying shoelaces, and the enjoyment a child feels when he is with his friends. Photographs can provide a means of sharing these significant stages of development with parents.

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