For more than a week, a mysterious pulsating light has been appearing nightly over Lake Erie east of downtown Cleveland — showing up at approximately 7:30 pm and zipping around in the darkness for about two hours before disappearing — reports MSNBC. Captured on film from various angles, it's now drawing nightly crowds at the lakefront. While Nick Pope, former chief UFO investigator at the British defense ministry, calls it a "significant sighting," some of the UFO's fans do not exactly inspire faith: "I have absolutely no expertise in this field, but I can guarantee you that it is not human!" says Eugene Erlich, a local college student who has been videotaping the lights. Watch MSNBC's report: