Resurrection Fern is a remarkable plant that usually grows on a host plant - often Oaks - without robbing them of nutrients. Classified as an Epiphyte or Air Plant they make their home on a host plant, but still photosynthesize the same as other plants. They absorb water through their leaves, so they do no damage to the trees they grow upon. A Resurrection fern can lose up to 75% of its water content in normal dry conditions and up to 97% in extreme drought conditions. Most plants can only loose about 10% of their water content before they die. The reason it is called a Resurrection fern is that with just a little bit of water it comes back to life right before your eyes. That's pretty impressive resiliency - to look seemingly dead and be very much alive. Looks can be deceiving.
Here's a video that explains the scientific processes of how the Resurrection Fern is able to seemingly die and resurrect.