Baltimore and the Northeast receive high amounts of snowfall. These areas use road salt to help melt the snow and ice.
A discussion on how to test the relationship between winter roads and salty streams.
Video profile of Dr. Sujay Kaushal, who studies the ecology of watersheds. Includes discussion questions about scientific practice and science as a human endeavor.
Salt used on winter roads could eventually make water supplies toxic to wildlife and unfit to drink.
About 4.6 billion years ago, our solar system came into being. This comic strip explains the processes that led to the creation of the planets and the asteroid belt.
I went on a class field trip to Fernwood Botanic Garden in southwest Michigan when I was in sixth grade. When we toured the restored prairie, the naturalist told us about invasive non-native plants such as garlic mustard and how they destroy native habitats. Most of my class was bored, but I was amazed. I wanted to learn more, especially because my grandfather owns a section of prairie in southwest Michigan. About five years ago, he completed a prairie restoration on some of his land, and I wanted to know if he also had non-native plants growing in his prairie.
If technology, cost, and terrain permitted, scientists seeking key data on stars in our galaxy would have loved to construct a behemoth 330 m wide telescope atop Mount Wilson, just northeast of Los Angeles. Instead, they arranged six smaller telescopes over an identical area, synchronizing the light to achieve an equally superlative resolution. Called the Center for High Angular Resolution Astronomy (CHARA), the array uses the technique of interferometry to spot details the size of a nickel seen from 16,000 km away. Hear from project astronomers why the labyrinthine engineering required for CHARA's renowned precision is a small sacrifice for the valuable data it gleans on the properties and life cycles of stars.
Launched on December 14, 2009, the WISE space telescope is helping scientists create a Digital Universe 3-D Atlas. Take a look at WISE and the data it is capturing.