>> reporter: however this was one adventure whisper was not a part of. i talked to one of the supervisors in yosemite today who said he saw whisper walking around yesterday, but for this close-knit community, jake a hue trach huge tragedy. >> thanks so much. an ice shelf at least 10,000 years old is likely to disappear by the end of this decade. this is a warning sign that scientists say is nothing but bad news for the planet. larsen b, part of a series of ice shelves along northwest ant antarctica likely to disintegrate by 2012. ice shelves function as barriers. as the shelves disappear, glaciers are more likely to diminish as well potentially raising sea levels across the earth. two decades ago larsen b was about as big as connecticut. now less than half the size of