Related topics:TravelAnimalsHistorySouth AmericaMore AnimalsWhat makes glass frogs transparent? The secret is in their blood.Central AmericaFrogsBloodRain ForestsMoreHistoryWho were the Maya? Decoding the ancient civilization's secrets.Central AmericaAgricultureArchaeologyArchitectureMayaMoreTravelMexico: the art and soul of San Miguel de AllendeMexicoCentral AmericaMoreAnimalsThese see-through frogs are full of surprisesEcuadorCentral AmericaFrogsResearchScientistsMoreTravelPatagonia: In the lost land of the giantsSouth AmericaArgentinaCentral AmericaPatagonia (Argentina)MoreTravelCaribbean: The perfect 10CubaTrinidad and TobagoCaribbean SeaCentral AmericaTobagoMoreHistorySmallpox killed 3 in 10, until one English doctor's miracle vaccineEuropeSouth AmericaNorth AmericaUnited KingdomCentral AmericaPeople and CultureMedicineHealthHistoryDiseasesSmallpoxVaccinationMoreHistoryChocolate Could Be 5,300 Years OldAmazon BasinEcuadorCentral AmericaArchaeologyMesoamerican CivilizationChocolateMoreAnimalsMeet The Slow-Mo Ninja Discovering Why Wasps Work For OthersSouth AmericaCentral AmericaInsectsResearchWaspsMoreHistoryExclusive: Lost City Discovered in the Honduran Rain ForestHondurasExplorersAncient CivilisationsExpeditionsArchaeologistsArchaeologyArtefactsRuinsPre-Columbian CivilisationsLost CitiesRain ForestsMore