Pigeon

@minouette @Inkysloth I said "almost certainly" the same based on what I do know certainly. Your tweet said she "invented frequency hopping"; she patented a not terribly original implementation of an idea invented before she was born. I don't follow obfuscated links.

@minouette @Inkysloth That's why I don't know how the Germans did sync (though patent itself says sync pulses well known). (Other thing that hacks me off is I don't think it's helpful that something so widely quoted to support feminism is not really true, at best dubious.)

@minouette @Inkysloth No, I haven't, and that's one thing that hacks me off about the Hedy Lamarr thing: it floods the search engines and blocks finding anything about earlier history of frequency hopping. (I only know of the WW1 use at all from an aside in a printed reference.)

@minouette @Inkysloth That's almost certainly the same method the Germans were using in WW1 - paper tape controlling switchable resonators. They were definitely using paper tape to switch amplitude before the war, so it would be natural to use it to switch frequency.

@Inkysloth @minouette No she didn't. The Germans were using it in WW1 and the idea goes back to at least 1913.

📷 Frank Moore @FrankMooreB2BW Collared Dove (Streptopelia decaocto) diving down for food #Mid_Wales

📷 lisa sardini @lisasardini Collared Doves in my garden #Northern_Italy #December2017

The sculptor finds the statue in the rock .. the pigeons find the rock in the statue #Siena #Italy Rob Menting @RobMenting #August2016

I admire Osaka pigeons....they know how to relax! #Osaka #Japan #birds #pigeons #nature

MT Rᴀɴᴊɪᴛ Sɪɴɢʜ Cʜᴀɢɢᴀʀ ‍ਰਣਜੀਤ ਸਿੰਘ ਚੱਗਰ ランジット @R4NJ1T_5C 📷 Leicester city centre. The River Soar is joined by the Grand Union Canal at Leicester. instagram.com/p/CGQI9C0H--x/

📷 David Kindervater @TheDGK Pittsburgh pigeon pose #USA

I hate your government, @BorisJohnson. And all of us who retweet this hate it, too.

📷 Vicky Outen Photo @vickyoutenphoto Stock Dove (Columba oenas). vickyoutenphotography.com

📷 evc_56 @Duardy55 Collared Dove on my street early Sunday #Puerto_Rico #Caribbean [Could be Eurasian Collared Dove or African Collared Dove

We keep going with the normal, ordinary, everyday things that have to be done. Photo via @SOphelie_

MT BirdWatch Ireland @BirdWatchIE Yes, it's a feral pigeon with lots of white in its plumage. They are descended from domesticated Rock Doves and have a hodge-podge of genes, so they can occur in a wide variety of odd colours and patterns. 📷 @MonkstownTidy

Adult Wood Pigeon taking on fuel. #TwitterNatureCommunity #BBCWildlifePOTD @BBCSpringwatch @wildlifemag @Natures_Voice @Team4Nature @NatureUK @SIBirdClub

'Woman with pigeons on head' Central Park #New_York 1976 📷 Richard Kalvar.

#Milan Oct. 11 - Our #pigeons appear to be at a partial self #lockdown today, I try to stay at home as much as I can as well: the #pandemics seems still under control here but the fatalities are going up again... #StayHome

This is George, the largest of the regular garden wood pigeons. His neck band almost meets up at the back and everything about him is broad and well groomed. Sadly missed on film but just after this he did a shimmy to shake excess wing dust loose, big cloud. #birds