Here's how to fold your own envelope. Just use leftover scrapbook paper or any decorative paper you have at home.

We have some English friends who still insist on using those tissue paper aerograms dating from the 1930s. You write the letter, fold it, lick some gummed flaps, and suddenly your letter has ...

A particular challenge comes from letterpackets, the art of folding a letter into its own envelope, and a newly-published Nature Communications paper details work from a team of academics in the ...