National Geographic : 1947 May
Ernest P.Walker Out on a Limb, but Who's Afraid? Mother (Right) Proudly Presents Her56-day-old Offspring The twin flying squirrels were born in Mr. Walker's apartment. The tiny babies each weighed one-fifth of an ounce atbirth. Here they have just been weaned. At the age of four months they traveled by air to Brazil to make their home with Miss Bertha Lutz, a biologist and afriend ofthe author (page 671).