There is no natural hole to the center of the planet Earth, so seeing what is in the center is difficult. University of Miami professor Ta-Shana Taylor talks about what is deep into the center of the Earth. Scientists haven’t ever drilled deeper than 2,000 feet into the Earth’s crust. Seismographs are used to measure earthquakes, which send waves of motion through the earth’s crust. Listen to hear about how scientists have tried to discover what is in the center of our planet.
Ice is an essential component of the ecosystem of the Bering Sea region. For example, sea ice cover can dramatically affect the levels of phytoplankton which has enormous effects on the entire food web. In this public radio story we hear about the health of the Bering Sea ecology by studying scientific observations.
Tsunamis are created by tectonic plates thrusting against each other and then lifting the sea floor and dropping it down, which creates a giant wave. A 2010 earthquake in Chile was caused by a shift in the seafloor. This same shift set off tsunami detection buoys and left scientists waiting for the tsunami to hit. But it ended up being small. Listen to learn more about this quake and how tsunamis are created.
Scientists are creating bacteria batteries by using wastewater to generate electricity. The microbes from sewage can be harnessed to develop microbial fuel cells. The process could provide ways to provide energy in remote places for very little money. Listen to learn how scientists are developing this energy and what they are learning from it.
One of the biggest earthquakes ever recorded struck recently, with minimal damage, no tsunami and it barely made the news. That’s because there are two kinds of earthquakes. This earthquake happened when two tectonic plates moved past each other horizontally, while more damaging earthquakes are caused when one plate slips beneath another. This radio story explains the two types of earthquakes and how they are gradually redefining the boundaries of the tectonic plates.
Global warming is expected to increase summer temperatures making cities even hotter. As concrete and asphalt within cities retain heat, it can increase health risks. The sun mixes with city pollution to create ozone that can irritate people's lungs, especially if they have breathing problems such as asthma. Listen to learn how public health officials are trying to help those living in the hottest areas.
Game wardens in California are now using DNA fingerprinting analysis to help protect illegal poaching of wildlife. There are many species, from large game to shellfish, which are being illegally caught or killed for food. Since there are so few game wardens to patrol the state, they are relying on forensic evidence to help track poachers. Listen to learn about the latest in DNA fingerprinting technology.
As nations look for clean energy alternatives many are turning to wind and solar, but Indonesia is turning to its volcanoes. Indonesia has 130 active volcanoes. These volcanoes generate geothermal heat that is releases through vents and hot springs throughout the country. Power companies are learning to harness and redirect this heated steam into power plants in order to generate electricity. Indonesia’s geothermal energy potential is huge, but start up costs and oil subsidies might prevent this burgeoning clean energy from taking off.
Some jobs such as doctor, lawyer and teacher, are easy to imagine and define. Other jobs, like being a shellfish and wetland ecologist is a bit harder for young people to understand. Help your students understand what an ecologist does by hearing from ecologist Danielle Kreeger. Kreeger is the science director for a group that works to protect and improve the Delaware River and Bay.
Woolly mammoths were large, elephant-like creatures that lived tens of thousands of years ago, during the last great ice age. The thick, furry coat is one of several traits that gave woolly mammoths an advantage in a very cold environment. Today, the closest biological relative is the Asian elephant, which prefers warmer climates. Scientists were curious about the genetic variations between the woolly mammoth and the Asian elephant, and what might account for the differences between the two species. In this audio story, we hear from a scientist who studied the DNA from the extinct mammoth and compared it to its contemporary descendant. Listen to learn more about what researchers discovered.