Things we don not know for sure – how it’s happening, how was created, how it is. Questions that people do not know the answer!
In the mid-16th century, when Spain sent its first scientific explorers to Mexico, Francisco Hernandez reported seeing a lizard squirt blood from its eyes. Horned lizards — found primarily in Mexico and the American Southwest. Imagine a horned lizard — fat and brown with horns pointing from the back of its head — sitting in …
The great white shark and the Salmon shark are closely related — each part of what’s called a shark “guild.” Up next — a scientist talks about tracking the movements of shark guilds. Speaking with Randy Kochevar, a scientist with California’s Monterey Bay Aquarium. Kochevar is principle investigator of TOPP — the Tagging of Pacific Pelagics …
Carbon dioxide, or CO2, makes up a tiny fraction of Earth’s atmosphere, and yet CO2 can have a big effect on long-term warming of our planet. A scientist talks about how Earth deals with CO2. And in the U.S., even though we have approximately 5% of the world’s population, we give off about a quarter …
What’s the biggest meteor that we know of that hit the Earth? And when and where did it hit the Earth? Computer models suggest that, early in Earth’s history, a piece of debris not much less massive than Earth might have slammed into us and created Earth’s moon. But there’s no direct evidence for this …
A question from a visitor. He writes, “Last summer while in my sailboat in southeast Alaska I could see what appeared to be icebergs floating in the sky. They appeared about 15 miles away. Icebergs were present, and the weather was calm, clear and warm. What makes this occur?” What you saw is what’s called …
Every year, Americans generate some 220 tons of waste that’s a little over four pounds of curbside garbage per person, per day. And much of this waste ends up in landfills, where there’s not enough air, water, sunlight and bacteria to let it decay quickly. In a landfill, garbage decomposes slowly. Bacteria convert available organic …
Bioreactors – bacteria are encouraged to flourish Continue »
“Are the glaciers we see here in Alaska remnants of the last ice age — or newer, more recent formations?” The geologists we talked with said that some Alaskan glaciers are very dynamic. For example, the glaciers of southeastern Alaska receive large amounts of snowfall each year. These glaciers give rise to a lot of …
El Nino is a warming in the Pacific Ocean that can affect weather half a world away. So far, predicting El Ninos has meant looking for subtle changes in sea surface temperatures and wind currents. But these changes signal that an El Nino has already begun. For example, last July, experts at the U.S. National …
The U.S. military uses small, remote-controlled airplanes for combat and spying. These are called uninhabited aerial vehicles, or UAVs. But Frank Cutler and his colleagues see a whole new use for these aircraft. Frank Cutler: . . . we’re exploring the use of UAVs, trying to heavily leverage what the Department of Defense has invested …
