“How do you spot a glacier?”/“You have to have good ice sight.”

“Ice sight” can sound like “eyesight.” “What you have to have to spot a glacier—GOOD ICE SIGHT” was printed in the newspaper “Jumble” puzzle by Henri Arnold and Bob Lee on July 10, 1981. “To spot a glacier you must have good ice sight” was printed in the book A Treasury of Science Jokes (1986) by Morris Goran.
 
“How do you spot a #glacier? You have to have good ‘ice sight!’” was posted on Twitter by Alaska Travel on May 7, 2018.
       
     
10 July 1981, Pensacola (FL) News, “Jumble” puzzle by Henri Arnold and Bob Lee, pg. 6A, col. 2:
Yesterday’s Answer: What you have to have to spot a glacier—GOOD ICE SIGHT
 
Google Books
A Treasury of Science Jokes
By Morris Goran
Springfield, IL: Lincoln-Herndon Press
1986
Pg. 74:
To spot a glacier you must have good ice sight.
 
Google Groups: bit.listserv.travel-l
puns for the weekend
Sonnie Willis
9/14/96
Past Puns of the day
(...)
35. To spot a glacier, you have to have good ice sight.
   
Google Books
The Everything Kids’ Joke Book:
Side-splitting, Rib-tickling Fun
By Michael Dahl
Avon, MA: Adams Media
2001
Pg. ?:
The world’s first glacier was spotted by a caveman with good ice sight.
 
Google Groups: alt.humor.puns
Puns of the Weak 02-21-03
Stan Kegel
2/21/03
(...)
To spot a glacier, you have to have good ice sight. (Pun of the Day)
 
Google Groups: alt.humor.puns
Puns of the Weak: 05-02-03
Stan Kegel
5/5/03
(...)
To spot a glacier you need good ice sight. (Mike Bull)
 
Twitter
Doug McMillan
@Doullan
You realize of course that to spot a glacier you have to have good ice sight.
6:09 PM - 11 Dec 2009
   
Twitter
Subway Belconnen
@SubwayBelco
“Glacier watchers need good ice sight”
8:49 PM - 24 Feb 2010
 
Twitter
PUNS
@omgthatspunny
To spot a glacier you have to have good ice sight. #punny
7:13 PM - 12 Dec 2011
 
Twitter
Alaska Travel
@alaskatravlnews
How do you spot a #glacier? You have to have good “ice sight!”
Photo by National Park Service/Jacob W. Frank #Alaska #TravelAlaska
12:12 AM - 7 May 2018