For decades,large,hairy,manlike beasts called Bigfoot have occasionally been reported by eyewitnesses across America.Despite the thousands of Bigfoot that must exist for a breeding population,not a single body has been found.Not one has been killed by a hunter,struck dead by a speeding car,or even died of natural causes.In the absence of hard evidence like teeth or bones,support comes down to eyewitness sightings and ambiguous photos and films.Since it is logically impossible to prove a universal negative,science will never be able to prove that creatures like Bigfoot and the Loch Ness monster do not exist,and it is possible that these mysterious beasts lurk far from prying eyes. L.The Taos Hum陶斯之声 Some residents and visitors in the small city of Taos,New Mexico,have for years been annoyed and puzzled by a mysterious and faint low-frequency hum in the desert air.Oddly,only about 2 percent of Taos residents report hearing the sound.Some believe it is caused by unusual acoustics;others suspect mass hysteria or some secret, sinister purpose.Whether described as a whir,hum,or buzz and whether psychological,natural,or supernatural no one has yet been able to locate the sound's origin.For decades, large, hairy, manlike beasts called Bigfoot have occasionally been reported by eyewitnesses across America. Despite the thousands of Bigfoot that must exist for a breeding population, not a single body has been found. Not one has been killed by a hunter, struck dead by a speeding car, or even died of natural causes. In the absence of hard evidence like teeth or bones, support comes down to eyewitness sightings and ambiguous photos and films. Since it is logically impossible to prove a universal negative, science will never be able to prove that creatures like Bigfoot and the Loch Ness monster do not exist, and it is possible that these mysterious beasts lurk far from prying eyes. 1. The Taos Hum 陶斯之声 Some residents and visitors in the small city of Taos, New Mexico, have for years been annoyed and puzzled by a mysterious and faint low-frequency hum in the desert air. Oddly, only about 2 percent of Taos residents report hearing the sound. Some believe it is caused by unusual acoustics; others suspect mass hysteria or some secret, sinister purpose. Whether described as a whir, hum, or buzz and whether psychological, natural, or supernatural no one has yet been able to locate the sound's origin