http://io9.com/century-old-photos-of-the-u-s-take-us-back-to-the-indu-1497015526
Nice photographs from early 20th century metropolitan areas.
Posted from WordPress for Android via my Samsung smartphone. Please excuse any misspellings. Ciao, Jon
Day: January 8, 2014
Auroras in Our Future? – Homepage Observing – SkyandTelescope.com
http://www.skyandtelescope.com/observing/home/Auroras-in-Our-Future-239252891.html
Aurora alert for tonight or tomorrow night. Too bad it will probably be cloudy in my neck of the woods.
Posted from WordPress for Android via my Samsung smartphone. Please excuse any misspellings. Ciao, Jon
Why we need to sleep in total darkness
Whenever I have trouble sleeping it’s almost always light related.
Posted from WordPress for Android via my Samsung smartphone. Please excuse any misspellings. Ciao, Jon