National Geographic : 2004 Oct
ax1 * "FROGS MAY NOT REMIND YOU OF PEOPLE, but in some ikinga cases our hormones are identical! Their sensitive skin makes S life-saV 1 them red flags for contaminants that could also affect us. Sep When they change color, it's a warning that dangerous, / even cancer-causing chemicals may be in the water people cook and bathe with. For nations struggling with huge health problems, a simple way to detect harmful water i could be acritical weaponagainstdisease." \\ - Tyrone Hayes -# 4% d" I 1 T^ Jl :"