Linn's Stamp News gives you a quick look at what's going on in the world of stamp-collecting.

1. Happy birthday, Penny Black

Though Great Britain's Penny Black stamp—the world's first postage stamp—was first sold on May 1, 1840, it was not put into use until May 6, 1840. 

Cheers to 175 years!

 

Happy 175th anniversary to the Penny Black; the world's first postage stamp became valid in Great Britain on May 6, 1840. #postage #postagestamp #mail #hobby #timbres #history #onthisday #onthisdayinhistory #greatbritain #classics #england #victorian #queenvictoria #pennyblack #pennyblackstamp #philately #stampcollecting

A photo posted by Linn's Stamp News (@linns_stamp_news) on May 5, 2015 at 6:47pm PDT

2. This is Jeopardy!

The popular syndicated television game show Jeopardy! featured a Stamps category in its episode broadcast nationally May 4.

3. Stamp Market Tips

Since independence, Lesotho has issued a plethora of colorful topical stamps, most of which have been well distributed and are readily available to collectors.

4. Yesterday's most-viewed post

5. Something social

OUT NOW! Mark the 175th anniversary of the Penny Black with our new Special Stamps: http://t.co/ZzaK9auenS pic.twitter.com/qnOrFfEr0e

— Royal Mail Stamps (@RoyalMailStamps) May 6, 2015