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" ... After a journey of about 1.3 billion light-years, the signal from those merging black holes arrived on Earth, where they passed through our planet. A tiny, tiny fraction of that energy was deposited into the twin LIGO detectors at Hanford, WA, and Livingston, LA, causing the lever arms that house the mirrors and laser cavities to alternately increase-and-decrease in length. That tiny bit of energy, extracted by an apparatus that humans built, was enough to detect our first gravitational waves. ... "
" ... It gets worse still. A British Antarctic Survey together with a US team recently mapped cavities measuring half the size of the Grand Canyon that are allowing warm ocean water to erode the vast Thwaites glacier in the Antarctic, accelerating the rise of sea levels across the world. ... "
" ... The inside of the LHC, where protons pass each other at 299,792,455 m/s, just 3 m/s shy of the speed ... [+] of light. Particle accelerators like the LHC consist of sections of accelerating cavities, where electric fields are applied to speed up the particles inside, as well as ring-bending portions, where magnetic fields are applied to direct the fast-moving particles towards either the next accelerating cavity or a collision point. ... "
" ... This infrared view of the Orion Nebula, unlike the visible light view, highlights the great cavities... [+] formed when active areas of star-formation cause ultraviolet light to evaporate large amounts of star-forming material, heating the gas inside, which then becomes rich in infrared radiation due to the increased temperatures. Spitzer took this composite image in a variety of wavelengths, with blues, greens and whites corresponding to higher temperatures and reds to lower temperatures. ... "
" ... “We have a very smart design, 10.5” wall with cavities to reduce energy consumption with high R value, to category 5 strength and to California seismic requirements,” said Casper. “We prefabricate every component ahead of time in the factory and we’ve labeled and organized it all in a 40’ container. So, the whole process can eliminate 80 to 90% of the various tradespeople. No mudding, taping, foundation.” ... "