These Termite Mounds Are 4,000 Years Old — And Still In Use

Posted on Categories Discover Magazine

This image shows mound fields. The mounds are found in dense, low, dry forest caatinga vegetation and can be seen when the land is cleared for pasture. (Credit: Roy Funch) Two hundred million mounds of dirt dot an area about the size of Great Britain in a tropical forest in northeastern Brazil. The cone-shaped dirt piles are roughly twice as tall as the average American man and stretch 30 feet across at the base. The mounds, the work of countless generations of termites, rise from the earth ev ...read more

Astronomers Find A 'Solar Twin' — A Star That Looks Almost Exactly Like Our Sun

Posted on Categories Discover Magazine

A composite image of the Sun taken by ASA’s Solar Dynamics Observatory (SDO). (Credit: NASA/SDO) Didn’t we all have that “Parent Trap” fantasy, where we’d come across a long-lost sibling that was separated at birth? That dream didn’t go beyond a movie plot for the most of us, but it’s just come true for the Sun. In a rare discovery, an international team of astronomers has found a star that was likely born in the same stellar nursery as our Sun. A ...read more

How Would We Save the Planet from a Killer Asteroid?

Posted on Categories Discover Magazine

Meteors are both common and beautiful. But larger impactors can cause devastating harm. (Credit: NPS) We don’t need to be scared of everything that falls from space. In fact, literal tons of space rocks rain down daily, though that’s mostly in the form of minuscule dust grains. But every 100 million years or so, catastrophe strikes in the form of a rock spanning miles. The last one killed not just the dinosaurs, but three-quarters of all life on Earth. The effects on huma ...read more

Are Big Earthquakes a Concern for the Eastern United States?

Posted on Categories Discover Magazine

Damage from the August 31, 1886 earthquake near Charleston, South Carolina. John Karl Hillers/USGS Most people who live in the eastern United States likely don’t worry too much about earthquakes. Most of the shaking that goes on across the country happens on the west coast, running up and down the San Andreas fault zone or in the Cascades of Oregon and Washington. Occasionally, an earthquake will rattle Yellowstone or Oklahoma feels an temblor brought on by waste water being pumped into t ...read more