[identity profile] spikesgirl58.livejournal.com 2018-04-08 01:15 pm (UTC)(link)
Looks like some pond water magnified.

[identity profile] fflo.livejournal.com 2018-04-08 04:08 pm (UTC)(link)
Yep. Drop of pond water.

[identity profile] microbie.livejournal.com 2018-04-09 12:37 am (UTC)(link)
spectacular!

[identity profile] peteralway.livejournal.com 2018-04-09 09:22 pm (UTC)(link)
I remember the U of Mich natural history museum used to have this really cool enlarged pond life diorama that looked enough like that for me to wonder if that's were the postcard is from.

[identity profile] fflo.livejournal.com 2018-04-09 09:43 pm (UTC)(link)
This one's from the Stamford Museum & Nature Center, located in Stamford, Connecticut, which is an art, history, nature, and agricultural sciences museum, according to the internet. And considering the postcard itself, it's probably from the late '60s or the '70s.

[identity profile] peteralway.livejournal.com 2018-04-10 03:36 pm (UTC)(link)
I wonder if both exhibits were made by the same people, or if one stole the idea from the other.