Book excerpt: Everything is connected on Earth, even if we can't see it right away. Biogeology is the study of the important and sometimes weird relationships between living things and the Earth itself. Young readers might know how beavers dam rivers to make ponds, but they probably don't know about the hungry bacteria that eat rocks to make sparkly minerals like pyrite. This fun, fact-filled volume reinforces essential science concepts with surprising examples and eye-catching art. Young scientists are also introduced to the causes and effects of climate change.