With over 2,500 species, the earliest found fossil is around 80 million years old ! In about the 5th century palm leaf was used for manuscripts. These evergreens can grow to around 200 feet, have the planet's longest leaf (around 66 feet) and the biggest and heaviest seeds. Palm trees produce, amongst other things, coconuts, dates, acai and palm oil. Heart of palm is also used as a vegetable, but it kills the palm as it comes from a part of the tree that can't be regrown. The urban legend is that more people are killed by falling coconuts than by sharks. It's not true...yet.