During the first half of the 20th century, scientists began to take notice that Earth’s climate was cooling. They made predictions that an ice age would approach in the distant future and that it was a natural phenomenon.

Most news articles followed a pattern like the Feb. 14, 1947 story out of Washington, D.C.

“A new ice age is racing upon the earth, say scientists, but there is no need to get worried to the point of making preparations for moving to the tropics.

“As the geologists and astronomers figure time, it will be only ‘tomorrow’ that mountains of ice will obliterate the…