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" ... NASA says that it could be that the TRAPPIST planets have a composition similar to Earth’s —- composed of about the same ratios of iron, oxygen, magnesium and silicon as our own planet. The crucial difference appears to be that the TRAPPIST planets simply lack Earth’s abundance of iron. Or it may be that the iron in the TRAPPIST planets are simply infused with higher levels of oxygen than Earth, creating iron oxide (or rust). This hypothetical additional oxygen, says NASA, would also act to decrease the planets’ densities. ... "
" ... New research shows the Moon has rust on its surface, which is quite odd. Rust forms when iron reacts with oxygen to form iron oxide. While rust is common on Earth, and even the surface of Mars, its presence on the Moon is unexpected. ... "
" ... The actual tape inside a cassette is just thin plastic film coated with a powdered magnetic material, iron oxide or chromium oxide, mixed with a binding chemical to hold the powder together and in place. Tape recorders use magnets to realign the particles in that magnetic powder, which can encode information like the frequency and amplitude of a sound – or the seismic waves of an earthquake. ... "
" ... This mineral tinted sunscreen from Cotz only contains titanium dioxide and zinc oxide, so it’s safe for your skin and the planet—including coral reefs. If you have a little one, Cotz makes a non-tinted version that’s safe for baby’s skin. But the sheer formula isn’t just for the beach—it’s so easy to blend that it’s perfect for the streets, too, thanks to its matte finish. ... "
" ... Very Low Sulfur Fuel Oil rose in prominence because of a half-measure, piece-meal culture of regulating the global shipping industry. Policymakers in this instance were solving for one isolated environmental challenge: reducing Sulfur oxide emissions from ships that kill people and cause early onset asthma and other public health challenges. ... "