Happy birthday to all you July babies! Your birthstone, the ruby, is among the most highly prized of gemstones. Large rubies are harder to find than large diamonds, emeralds and sapphires.
If you run a damp finger along the rim of a glass, you might hear a faint, ghostly hum – the resonant frequency of the glass. To shatter the glass, a singer’s voice has to match that frequency, or pitch, at an extremely loud level, and the glass must have microscopic defects.
Solstice – year’s longest day for northern part of Earth – was Sunday. But our hottest weather is still to come. Likewise, the coldest weather is ahead for S. Hemisphere.
It is indeed possible to see the whole circle of a rainbow – but conditions have to be just right.
Fireflies are sometimes called lightning bugs. Many a child has spent a summer evening chasing them. And maybe you’ve wondered – how and why are these insects able to light up?
Warming temps, and the rise and fall of coasts, complicate measurements of sea level. How do scientists establish sea level on a constantly changing Earth?
Scientists agree that there’s oxygen from ocean plants in every breath we take.
Ever wonder how hurricanes get their names? And why do hurricanes have names at all? Meteorologists long ago learned that naming tropical storms and hurricanes helps people remember the storms, communicate about them more effectively, and so stay safer if and when a particular storm strikes a coast. Find out more about hurricane names inside.
Happy birthday to all our June baby friends! Your month has three traditional birthstones – pearl, moonstone, and alexandrite.