This is a mobius strip of Level 1 or Super Mario Bros. The whole level is wrapped around itself in a single surface, and poor Mario begins and ends at the same spot every time :(

All the elements from the level are there: every mushroom, turtle, cloud and star. They are all carved out of the surface at different heights, which looks fantastic when you have a light coming from the side, and each block casts a shadow.

It's a great piece to have on your desk, or to hang from a string to let it spin around.

A compound mobius strip created out of 36 interlocking mobius strips.

All segments are thin mobius strips, and they weave and interlock perfectly through the spaces left between them. Highly complex, and a headache to look at, yet it possesses an inherent mathematical simplicity and beauty.

This model is 3d printed out of a sintered vinyl plastic, which makes it very resilient and bendable. It won't break if you drop it.

I created the skeleton of a skeletal Lepidoptera. The Death's Head Hawkmoth (Acherontia atropos), seen on The Silence of the Lambs , has a skull marking on its back. I made a full human-like bone structure for the moth, with the grinning skull protruding from its back.

The model is very thin, yet sturdy and flexible. Detail level is fantastic, and the natural texture of the 3d printing process gives it a bone-like appearance that works wonders.

Yes, moths don't have endoskeletons, that's the whole point...

This is for iPhone 5 only. If you want the iPhone 4 / 4s case, follow this link.

An old school rotary phone case that actually spins and snaps back into position (watch the video in the gallery above to see it in action).

This 3D printed case has a built-in coil spring that allows you to dial any number, and see the wheel spin back into place automatically. It comes fully assembled, but there are two things you should know:

1) You need to pre-rotate the wheel once by lifting the stopping tab and rotating until a bump in the wheel passes under the tab. See video for clear instructions.

2) You might need to remove excess dust from the printing process manually. The wheel might not spin smoothly until after all dust is removed and you use it a few times, but most of the time dust should be minimal and you won't have to worry about it. See video for tips on how to do this.

Charles Darwin's first ever sketch of a tree of life, in the shape of an actual tree, with finches perched on the branches. Each branch and minute detail of Darwin's original drawing is represented, and each finch represents the A, B, C and D marks on his sketch. The sketch appeared in his private notebook (“Notebook B on the transmutation of species,” 1837–1838).

From a side view, the shape of the tree matches perfectly with Darwin's drawing (look at the last image for a comparison). If you look carefully, you'll notice that each finch is slightly different, and the more apart they are from each other in the evolutionary tree, the more distinct the differences are.

A great gift for taxonomists, biologists, skeptics, humanists, atheists, lovers of nature and rational thought. Also a great gift for creationists, seriously, they'll love it! :)

The sketchy text on the same page of Darwin's notebook reads: "I think ... Case must be that one generation then should be as many living as now. To do this and to have many species in same genus (as is) requires extinction. Thus between A & B immense gap of relation. C & B the finest gradation, B & D rather greater distinction. Thus genera would be formed.—bearing relation."

Charles Darwin's first ever sketch of a tree of life printed in solid silver. Each branch and minute detail of Darwin's original drawing is represented. The sketch appeared in his private notebook (“Notebook B on the transmutation of species,” 1837–1838).

Chain is NOT included, but a chain can easily be attached if you want to wear it. It comes in a soft black velvet bag.

A great gift for taxonomists, biologists, skeptics, humanists, atheists, lovers of nature and rational thought. Also a great gift for creationists, seriously, they'll love it! :)

The sketchy text on the same page of Darwin's notebook reads: "I think ... Case must be that one generation then should be as many living as now. To do this and to have many species in same genus (as is) requires extinction. Thus between A & B immense gap of relation. C & B the finest gradation, B & D rather greater distinction. Thus genera would be formed.—bearing relation."

The design is based on the classic Celtic-style knot symbol for the World Tree from Norse mythology, Yggdrasil.

Inside the leaves you can see a small sphere of blue. If you look reaaally carefully, you could notice that the continents in the blue ball are in the shape of Pangea and not our current distribution.

Half Life 2 meets Portal. Gordon Freeman and Alyx Vance's best friend, DOG, contemplating the beauty of his new toy, a companion cube. What else could you possibly want? Oh, that's right, Half-Life 2 Episode 3 would be nice...

Gabe, are you listening?

This uses the original texture maps from the game, you can even see the Lambda Half Life logo on DOG's back.

It wasn't easy! I had to remap all the textures manually, and fix all the geometry to make it printable and thick enough to support the weight. I also made most large pieces hollow, but you won't notice that at all (except in the reduced price this provided).

An early cosmological model of our solar system, in full 3d-printed detail. From Kepler's book "Mysterium Cosmographicum", 1596. Kepler thought that the planets orbited the Earth, each within an orbit set on a regular polyhedron. He was mightily wrong, but his design is iconic and inspiring.

All regular polyhedra are represented, in this order from the inside out: octahedron, icosahedron, dodecahedron, tetrahedron, cube. I also included the text from the page of Kepler's book, "Tabvla III Orbivm Planetarvm" and "Johannes Kepler" on the opposite side of the base.

Try coloring it! The material is porous and you can submerge it into tea, wine, etc to give it color.

Notes on Kepler's work and this planetary model

In the XVI century, the German astronomer Johannes Kepler (1571-1630) tried to find a relation among the five regular platonic solids and the six planets known in his time: Mercury, Venus, Earth, Mars, Jupiter and Saturn. Kepler thought the two numbers were connected: the reason there were only six planets was because there were only five regular solids.

In 1596, in his work Mysterium Cosmographicum, Kepler established a model of the solar system where the five platonic solids were inserted one inside another, separated by a series of inscribed spheres. He realized that the ratios among the planets orbits' radii could match the ratios among the spheres' radii. His model, however, was not supported by the experimental data from the astronomers Tycho Brahe (Danish, 1546-1601) and Nicolau Copernicus (Polish, 1473-1543). Indeed, his model was entirely disapproved by posterior discoveries of the planets Uranus and Neptune: there are no additional platonic solids that determine their distances to the Sun. However, from his research, new solids were discovered (that, nowadays, are named after him), the perception that the orbits of the planets are not circles but ellipses, and the three laws of the planetary motion.

Because you can never have too much C8H10N4O2.

Caffeine molecules support the dynamic polygonal structure of this extremely geeky espresso cup. Each atom is visible and is identifiable by its size, with the single and double covalent bonds represented by single or double lines.

This is real, non-toxic glazed ceramics, fired in a kiln. The size of a regular espresso cup, holds 2 ounces (60 ml).

Looking for a larger, mug size? Available here!

This is for iPhone 5 only. If you want the iPhone 4 / 4s case, follow this link.

An iPhone case for the fans of the American cult television comedy series created by Joel Hodgson. The back of the iPhone looks quite like a movie screen, and the man conveniently points to the Apple logo while his robot sidekicks watch.

This is a bit of a delicate case, since the arms and heads of the characters are small and thin. You might break those details if you get them stuck in your pocket or something. It is not the most sturdy case ever built, it was made just for fun for the fans, but it will protect your phone nonetheless.

This is for iPhone 4 / 4s only. If you want the iPhone 5 case, follow this link.

An iPhone case for the fans of the American cult television comedy series created by Joel Hodgson. The back of the iPhone looks quite like a movie screen, and the man conveniently points to the Apple logo while his robot sidekicks watch.

This is a bit of a delicate case, since the arms and heads of the characters are small and thin. You might break those details if you get them stuck in your pocket or something. It is not the most sturdy case ever built, it was made just for fun for the fans, but it will protect your phone nonetheless.

This is for iPhone 5 only. If you want the iPhone 4 / 4s case, follow this link.

The skeletal essence of a dead leaf, with minute details of veins in different widths. I replicated the branching straight out of pictures from dead leaves, so the pattern is extremely realistic.

All the buttons and connections are clear, the case clicks in tightly and securely.

Note: If you are worried about the stem almost touching the flash area, that has been fixed. I moved the stem farther to the right than in the model I used for the pics, so do not worry about it, it will not screw up your flash pics.

This is for iPhone 4 or 4/s only. If you want the iPhone 5 case, follow this link.

The skeletal essence of a dead leaf, with minute details of veins in different widths. I replicated the branching straight out of pictures from dead leaves, so the pattern is extremely realistic.

All the buttons and connections are clear, the case clicks in tightly and securely.

Sebastian from the animated short Sebastian's Voodoo. Full color looks great, using the original texture maps and model from the film. Watch the film at www.pixelnitrate.com

This is for iPhone 4 / 4s only. If you want the iPhone 5 case, follow this link.

An old school rotary phone case that actually spins and snaps back into position (watch the video in the gallery above to see it in action).

This 3D printed case has a built-in coil spring that allows you to dial any number, and see the wheel spin back into place automatically. It comes fully assembled, but there are two things you should know:

1) You need to pre-rotate the wheel once by lifting the stopping tab and rotating until a bump in the wheel passes under the tab. See video for clear instructions.

2) You might need to remove excess dust from the printing process manually. The wheel might not spin smoothly until after all dust is removed and you use it a few times, but most of the time dust should be minimal and you won't have to worry about it. See video for tips on how to do this.