From the first unicellular life on Earth, living things have had the capacity to sense heat and cold and to avoid extreme temperatures. With the development of a bigger brain and a constant body temperature, mammals were able to change their habitats. The interplay between behavior, body temperature[...]

"A bilingual account of some of the animals and sounds commonly found in the Southwestern desert. Each double-page spread depicts a vast expanse of light blue sky with four lines of text—two in English and two in Spanish—on the verso, and a different creature or scene on the recto. . . . The trans[...]