The National Geographic Magazine, Volume 200

acres adverse Africa American animals arthritis bears blood body century CHAUVET CAVE clinical conservation daily Director doctor dose drug ECL cell effects elephants esomeprazole experience exploration feet fish forest head human human dose increased island known land living look manage MAPS medicines miles million mountain named Nasal NATIONAL GEOGRAPHIC National Park natural NEXIUM North occur Ocean omeprazole once oral pain past patients percent photographer population President production protect range rarely rats reactions received recommended reported Research River says seen Service ships side silk South spider studies surface tell things tion trail treated treatment trials United VIAGRA VIOXX walk wildlife