In modern paleontology it is still a very common phenomenon that fossils are over-interpreted by the scientists and over-hyped in the media.
A microbe was found to organize its electron transport machinery in a way that bends the membrane for optimum energy utilization.
Rapid eye movement may indicate neural activity, but dreaming for me implies a conscious awareness of the dream state, which I consider as unlikely in spiders.
Public health lecturer James Hamblin at Yale decided to go without showers — for five years!
It could be anything, from a coelenterate-grade or sponge-grade organism to even a protist or an alga.