Some of the latest research on the effects of curiosity on learning and memory comes via the Center for Neuroscience at the University of California Davis in a study just published by the journal Neuron and authored by Matthias J. Gruber, Bernard D. Gelman & Charan Ranganat.
The study reports a surprising new finding: "in both immediate and one-day-delayed memory tests, participants showed improved memory for information that they were curious about and for incidental material learned during states of high curiosity." [emphasis added]
As described by Charan Ranganat in the video abstract below, when it comes to learning and memory, "it's almost like curiosity is warming up the Hippocampus ahead of time."
For more on the results of the study, you can read the Scientific American article Curiosity Prepares the Brain for Better Learning and view the video abstract below: