The Rainforest is home to half of all animal and plant species. There are two kinds of rainforests: tropical, which are warmer and closer to the equator, and temperate, which are found above and below the equator in coastal regions. The rainforest is the oldest and most biodiverse ecosystem, with scientists estimating some forests in Southeast Asia having existed 100 million years ago. The trees in the rainforest can reach heights of 250 feet with dense canopy cover, which results in a lack of sunlight reaching the forest floor. Due to the intense thickness of trees in the rainforest, many animals living here have adapted to climbing and living in trees.