The candle clock. A timeless invention that has been used to measure time – and wake people up – for centuries. And it works in such a simple but cool way. Candle clocks, also known as candle timers, are devices that use the rate of burning of a candle to determine how much time has passed. A candle clock in its most basic form consists of a candle, a holder, and a marking … [Read more...] about People Used These Candle Clocks To Tell The Time And Wake Up Before Electricity
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The Earth’s Spinning Inner Core Recently Paused Then Changed Direction
Earth's inner core said: "I put my thang down, flip it, and reverse it." According to a new study, the swirling solid ball at the center of Earth's inner core appears to have recently paused and may even now be rotating in the opposite direction as in previous decades. A pair of Chinese scientists have been studying seismic wave data from earthquakes that have blasted … [Read more...] about The Earth’s Spinning Inner Core Recently Paused Then Changed Direction
A 1.2 Million Year Old Obsidian Axe Factory Was Discovered In Ethiopia
It appears that an unidentified species of human has mastered obsidian, which was previously thought to have only been possible in the Stone Age. Obsidian is without a doubt one of the most badass materials ever imagined, having been forged in magma and having the ability to produce the sharpest blades on Earth (there's a reason George RR Martin chose it as the weapon of … [Read more...] about A 1.2 Million Year Old Obsidian Axe Factory Was Discovered In Ethiopia
The National Geographic Travel Photo Contest: Eye-Opening Entries
The National Geographic 2019 Travel Photo Contest has been open since March 18, and submissions will be accepted until May 3, 2019, at noon Eastern Standard Time. Every week, the publication has revealed a selection of entries from the previous week. A split-shot capture of an adolescent humpback whale, a candid moment of a mother loon feeding her chicks, and squiggles of … [Read more...] about The National Geographic Travel Photo Contest: Eye-Opening Entries
Do These Photos Show MRIs of Fetuses?
Popular social media posts feature authentic MRI images of fetuses. Future parents beware: When imaging a fetus, doing so with magnetic resonance imaging, or MRI, may induce nightmares. Take, for example, this compilation of images that was first posted to Twitter in 2021 and to a Reddit forum later that year. These ghoulish images once again rose to popularity … [Read more...] about Do These Photos Show MRIs of Fetuses?