A mangrove is a shrub or tree that grows in coastal saline or brackish water, first appearing during the Late Cretaceous to Paleocene epochs, and became widely distributed in part due to the movement of tectonic plates. The San Pedro Martir mangrove forest was once on the shores of a vast ocean where the temperature was much warmer, but is now situated more than 170 kilometres inland due to climatic changes in sea levels. The forest offers a snapshot of the ancient past, allowing scientists to understand how environments adapted to changing sea levels as the global climate changed... In...