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A recently published study confirms that native trees are most effective in hosting caterpillars, an important food for birds.
When a common year of 365 days starts on a Sunday, as it did this year, 2 Friday the 13ths are inevitable. The 1st one was in January and the 2nd in October.
For 32 years, scientists have tracked the oxygen-depleted waters that appear each summer in the Gulf of Mexico. This year’s dead zone is the biggest yet.
A total solar eclipse of August 22, 1142 may have coincided with the birth of the Iroquois Confederacy, oldest democracy in North America and possibly on Earth.
SG Collins explains why the Apollo moon landings on the moon in the late 1960s and early ’70s couldn’t have been faked.
On April 10, 2013, one of the largest non-volcanic landslides in the history of North America took place at the Bingham Canyon mine in Utah.
In Chinese thought, spring is associated with the direction east, the sunrise direction as Earth spins us toward the beginning of each new day.
Every calendar year has at least 4, but 5, 6 or even 7 eclipses are also possible. Why don’t we see them all?
Retrograde motion of Jupiter or Mars or Saturn in our sky is an illusion, caused by Earth’s passing these slower-moving outer worlds. But there’s a real retrograde motion, too.
In 1963, Maarten Schmidt suddenly realized that quasars are exceedingly distant and unimaginably luminous. His revelation changed our notion of what the universe is like.
Jupiter in the rearview mirror
Moon, Saturn and Mars on October 14-17