Brain data form of MNIST

This is a really interesting data set, small size about 2.69 GB and about 400 Million data points. It records the brain signals of different people when they think about the numbers 0 through 9. There have been a variety of previous studies by Yale, Berkeley, & Princeton showing that with similar data you can reconstruct images that people are thinking about or do other forms of "mind reading", alternatively you can analyse how information is represented in the brain.

http://www.mindbigdata.com/opendb/