How does life work? How does nature know how many zebras and lions should live in the savanna or how many fish should swim in the ocean? How does our body know how many red blood cells should be in the blood? Sean Carroll, an American biologist and leading expert in the field of evo-devo, tells us an incredibly interesting story of discoveries. Nature's hidden secrets are the laws that govern the number of cells in our bodies, animals and plants in the wild. The most amazing thing about these rules is that they are similar and obey the same logic - the logic of life. Carroll talks about how knowledge of the laws of the human body stimulated the development of drugs and leads us to believe that it is time to use the laws of the “jungle” to heal our ailing planet. A bold and inspiring work by one of the most famous biologists and gifted popularizers of science tells about laws of life in all forms, manifestations and scales. Read this book and your view of the world will change.