Madagascar's wildlife is almost wholly unique ... more than 60 miles of cave passages, and underground rivers that lead to miniature lost worlds where the cave roof has collapsed and pockets ...

At almost every lake where he has worked in Madagascar, he says ... which they name Voa, with which the Rivers and Lakes of this Island are full; saying that they wish to be eaten by them ...

Vanilla drying in the sun in northern Madagascar. Credit: Wikimedia Commons That’s according ... They use hand tools such as sickles and shovels and water from springs and rivers to care for their ...