In the examples below, notice that transportation and park ticket prices stay the same even when the number of days changes. If you're staying somewhere that's relatively inexpensive and not eating out all the time, you can often extend a trip from 4 to 7 days for very little money.
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Of course, we canât know exactly what colors babies or other animals see because they canât tell us. Instead, we can use what we know about the eye and cones to put together an idea of how it all works. We cats have red, blue, and green kinds of cones, too. Dogs have only two kinds: one for blue and one for yellow. The mantis shrimp, with their rainbow-patterned exoskeletons, have 16 kinds of cones. This particular shrimp can even see certain kinds of ultraviolet light that humans canât see.