
Ecosystems
Scientists Say: Decay
This word can refer to rotting flesh or the transformation of radioactive atoms.
This word can refer to rotting flesh or the transformation of radioactive atoms.
Traces left by nuclear-bomb testing in the 1950s and ‘60s can help researchers learn how old a whale shark is.
Long, long ago, in a galaxy far, far away, a black hole blasted out 100 billion times as much energy as our sun ever will. One word for that: Wow!
Geologic time is unimaginably long. Geologists puzzle it out using a calendar called the Geologic Time Scale.
Despite one oil company famously using an Apatosaurus as its logo, oil, gas and coal don’t come from dinosaurs. They do, however, come from a long time ago.
How did our moon form? Scientists are still debating the answer. It may be the result of some one big impact with Earth — or perhaps many small ones.
Even at only a little more than four light-years away, a trip to our closest exo-world could take some tens of thousands of years — unless we’re willing to settle for virtual visits.
The humans that began farming 10,000 years ago in the Fertile Crescent may have been two cultures living side-by-side.
Fears that the world may soon run out of helium have been set aside for now by the finding of a huge reservoir of the gas in East Africa.
Neandertals built stalagmite circles in a French cave 176,500 years ago. These structures show that these ancient human cousins had social and technical skills.