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
1.2-Million-Year-Old Obsidian Axe Factory Found 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 1.2-Million-Year-Old Obsidian Axe Factory Found 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
Disturbing MRI Images Reveal What Happens During Pregnancy Scans — And Why They’re Rarely Used
Unusual and unsettling images circulating online have sparked curiosity about how medical scans work during pregnancy — especially when it comes to MRI technology. While these images may look alarming at first glance, they actually reveal something important about how doctors study fetal development and why certain imaging methods are used more cautiously. What the Images … [Read more...] about Disturbing MRI Images Reveal What Happens During Pregnancy Scans — And Why They’re Rarely Used