Cancer cells decide how to behave by “listening” to signals around them. Scientists recently studied these signals by watching cancer cells as the cells moved through their environment.
When you think of hummingbirds, you may think about how they can fly in almost any direction. But there is a lot more to these acrobatic birds than meets the eye.
When you think of the arctic, you might picture mostly empty ice, but the Arctic ecosystem is home to many organisms. Much of this life in the arctic depends on tiny organisms called plankton which make up the base of the food web.
What is an ecological footprint?
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