This surreal optical illusion reveals your hidden traits. Whether you first notice the face, hair, man, or sky, your choice ...

Seeing and imagining use similar brain machinery. New research reveals the brain circuit that identifies what is real, which ...

An echo of dynamite -- Implausible city -- A thirsty place -- Alternate realities -- Stories in light and shadow -- On location -- A river now is here -- The birth of an industry -- Water and ...