As with the fantastic posters we showed you before, these helpful warnings are the work of Amy Kate Martin, whose Flickr stream includes bumper stickers for two dueling brands of clones. ("The You You Always Wanted" is one slogan.) This time around, the posters are warning against loose robots, careless changes to the time stream, and burning the whole prehistoric world down. The 826 Los Angeles store sells time travel goodies, and also teaches literacy and writing skills, since temponauts may actually need to be able to read the instructions on their time-capsules. Just maybe.

These new posters are available for just $19.99 each, or $69.99 for all four. [826 L.A.]

Christina Galante of the Echo Park Time Travel Mart writes to say:

826LA and the Echo Park Time Travel Mart are proud to premiere a collection of five original travel posters by Los Angeles based artist Amy Martin. Each poster advertises a vacation destination in the far past or distant future, transforming the predictable aesthetic of the travel poster with ironic sloganeering such as "Life is Bigger in Pangaea" and "Enjoy Tokyo 2.0" coupled with clean, retro graphic design.

They are on sale now online or at the Echo Park Time Travel Mart at 1714 W. Sunset Blvd in Los Angeles, CA. Posters are $19.99, with $10 off if you buy em all. All proceeds go to 826LA, a nonprofit dedicated to teaching students ages 6 - 18 creative and expository writing, and to helping teachers inspire their students to write.

You can see more of Amy Martin's work on her Flickr page.