This card is called a paper wallet. It represents an address on the Ethereum blockchain where we have stored digital assets for you. This card comes preloaded with 1,000,000 Gwei, or 0.001 ether (Ξ). Gwei is a denomination of ether ...

One frilled echinoid specimen displayed in an acrylic case. A perfect addition for your natural specimen collection. Please note: this listing is for one specimen, ranging in size from .75"-1.5". Larger specimens will be prioritized first.

Orbicular Jasper, commercially known as Ocean Jasper, is a variety of jasper with circular patterns of a wide variety of colors. It is mined in Madagascar, Nebraska, and was recently discovered in Bulgaria. The spherical structures of color are created ...

Kevlar® is a synthetic material that is 5x stronger than an equivalent weight of steel. First developed in 1965 by chemist Stephanie Kwolek, Kevlar® has since become the trusted fiber in critical applications that require low weight and high strength. ...

These geometric shapes are a type of abrasive material used in industrial tumble finishing. These could be used for tumbling rocks, cleaning up 3d prints, crafting, or just add them to your kids sandbox to make play more interesting. Technical ...

Chrysoprase is a nickel-rich variety of quartz with distinct green coloring. Unlike other green minerals like emerald, which usually derive their coloring from chromium impurities, chrysoprase is colored by nickel—which also makes it slightly magnetic. Darker shades of green correspond ...

Explore the geology of our neighboring planet from your home. This collection of Mars-related items is perfect for any space enthusiast. What's in the box: Martian Meteorite — Yes, an authentic piece of rock from Mars. This is absolutely the ...

NEW A set of fascinating ways to explore magnetic attraction. Includes:Magnetic Viewing FilmRare Earth MagnetsHorseshoe MagnetMagnetic Pole DetectorLensatic Compass

Relax with a glass of your favorite wine while wondering at the space telescopes that we've used to peer ever deeper into the void. Each telescope is set alongside the section of the electromagnetic spectrum it studies. 13oz/400mL

The Three-Polarizer Paradox is a popular light experiment originally presented by theoretical physicist Paul Dirac in his 1930 book The Principles of Quantum Mechanics. It is often used to illustrate the strange behavior of quantum mechanics, but it can be ...

Among the treasures discovered in the tomb of Egyptian King Tutankhamun was an ornate breastplate adorned in gemstones. The centerpiece of the artifact is a large scarab carved out of a luminous yellow stone, now known as Libyan Desert Glass. ...

A diffraction grating is an optical tool that features many parallel slits or grooves etched onto a flat surface. When light passes through the grating, it diffracts or spreads out into a spectrum of colors. Unlike refraction, such as when ...