The Persistent Urban Soundscape of Vibrant Mexico City
Mexico City has a mystery humming sound that only some people can hear, and its origin remains unknown.

Carbon monoxide is one of history's most feared silent killers — yet it is also an endogenous signaling molecule produced by the human body, with emerging medical applications in surgery, organ preservation, and inflammation control.
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MysteriesMexico City has a mystery humming sound that only some people can hear, and its origin remains unknown.
FoodPotatoes naturally contain slight amounts of radioactive material.
AnimalsDid you know that fireflies or lightning bugs aren't actually flies or bugs but are types a beetle?
ScienceDid you know that the Earth once had a naturally occurring nuclear fission reactor?
FoodPotato chips, a ubiquitous snack, were accidentally invented by a chef in the United States while trying to appease an unhappy customer.
NatureDay-Neutral or Everbearing strawberries, unlike their summer-producing counterparts, can bear fruit virtually year-round in mild climates.
MysteriesThe Savuti Camp is home to a mystery: Namely, a fully-grown and living Baobab tree that floats on a lagoon with its roots partially submerged in the water.
NatureTrees, contrary to popular belief, are not silent or passive organisms but have a complex communicative network beneath the soil.
ArtsA car part was used as a dominant prop in the classic musical film 'The Sound Of Music.'
AnimalsKomodo dragons, the world's largest living lizards, have blood with surprisingly effective antibacterial properties.
OdditiesAn unusual annual event hosted at Harvard University which honours unusual and imaginative research projects from around the world.
SpaceSound can't travel in space due to the lack of medium.
HistoryThe color mauve was accidentally discovered by an 18-year-old chemist named Sir William Henry Perkin while attempting to create a synthetic quinine, a treatment for malaria.
AnimalsEarthworms are known to improve soil fertility and agricultural productivity, but they also play a vital role in mitigating climate change by sequestering carbon.
Health19th-century 'Uranium Glass' glows bright green under UV light as it was made with small amounts of uranium.
FoodChocolate chip cookies were born from a baking blunder in the 1930s when Ruth Wakefield, proprietor of the Toll House Inn, tossed bits of Nestle's chocolate into her cookie dough expecting it to melt and create a chocolate cookie.
HealthQuinine, a medication used to treat malaria, was discovered accidentally by the indigenous people of Peru.
HistoryThe popular toy known as 'Silly Putty' was invented accidentally during World War II while attempting to create a synthetic alternative for rubber.
FoodCucamelons, also known as Melothria scabra, are a fruit which has the size of grape but resembles a miniature watermelon.
FoodPineapples and oysters both have certain enzymes that make them natural meat tenderizers.
SpaceThe Red Square Nebula, HD 44179, is a uniquely square-shaped star system located 2,300 light-years away. Its symmetrical features puzzle astronomers and suggest energetic central phenomena.
CultureRemarkable similarities exist between diverse folkloric traditions around the world, a phenomenon known as 'Folklore Parallels'.
NatureIn plant roots ecosystems, tiny insects and mites form a bustling ecosystem that is seldom noticed.
FoodHousehold citrus fruits like lemons and oranges, once consumed, can provide aromatic potpourri instead of going to waste.
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