Article documenting the case of Patient AB, who began hearing voices, but the voices were kind to her instead of harsh. They advised her to seek treatment, and warned her of a brain tumor that the doctors had missed. After she had surgery, the voices happily bid goodbye. She never heard them again
Reindeer are the only known mammals whose eyes seasonal change color – from gold in the summer to a deep blue in the winter, making the eye up to 1,000x more sensitive to light in near-total darkness conditions.