Here's one for my #Philately / #StampCollecting friends! My good friend Jack sent me a postcard from his travels, and on it, he included this interesting triangle stamp. As he noted to me, "I wanted to send you one of these new triangle postage stamps. It's the first time USPS have issued a triangle stamp in 30 years!".
In fact, this is even cooler than that - it's not just one stamp, there is a set of four which fit together neatly in a square: https://www.stampworld.com/stamps/United-States/Postage-stamps/g6576//
And searching a bit further, this is a "Global postcrossing forever" stamp, which means it is an international postcard rate and you can use one of these stamps to send a postcard anywhere in the world. There's a whole group about these: https://www.postcrossing.com/blog/2026/03/31/a-new-postcrossing-stamp-from-the-usa
And fittingly, this postcard with the motorbike postie stamp WAS delivered to me by my postman, on his bike (They used to ride motorbikes, but these days, they're on an e-Bike).
Thanks Jack!