Cracking the Scent of Cleopatra's Perfume

Scientists are using biomolecular approaches to decode past scents, including recreating Cleopatra's perfume. Lunar soil samples collected by China's Chang'e-5 mission suggest that tiny glass beads on the moon's surface could contain trillions of pounds of water. Recordings of different plant species reveal that they emit a popping or clicking sound that is not detectable by the human ear. Old Masters of the 16th through early 18th centuries used proteins, especially egg yolk, in their paint. Human noise pollution disrupts wildlife, including causing elevated stress levels in a lizard species near a US Army base in Colorado.