Leatherback Trust To achieve this, the Park trained former poachers as eco-tour guides. Those guides now take tourists to see nesting sea turtles. Las Baulas National Marine Park now hosts guided sea turtle tours over the entire leatherback sea turtles nesting season, spanning from October until March. The Leatherback Trust played a key role in supporting the government of Costa Rica in compensating landowners for property that was within the national park. Owners cannot build or otherwise disturb that land so it is reasonable that they receive fair compensation for the land, which then becomes part of the Park. The Leatherback Trust
History of manifolds and varieties spaces with a differentiable or topological structure, while "variety" refers to spaces with an algebraic structure, as in algebraic varieties. In Romance languages, manifold is translated as "variety" – such spaces with a differentiable structure are literally translated as "analytic varieties", while spaces with an algebraic structure are called "algebraic varieties". Thus for example, the french word "" means topological manifold. In the same vein, the Japanese word "" (tayōtai) also encompasses both manifold and variety. ("" (tayō) means various.) Ancestral to the modern concept of a manifold were several important results of 18th and 19th century mathematics. The oldest