Beavers build dams that change the way water moves between streams, lakes, and the land. In Alaska, beavers are moving...
Otoliths, also known as ear stones, are small body parts that help fish with hearing and balance. Like tree rings...
Yosemite, Kings Canyon, and Sequoia national parks protect over 1,200 mountain lakes. These lakes provide healthy homes...
Climate change is occurring today because of a buildup of carbon dioxide (CO2) in the atmosphere. This buildup of CO2...
All animals, including you, need oxygen to breathe. Many kinds of tiny microorganisms (microbes) also need oxygen. But...
Have you ever wondered what happens to the leaves on berry plants after we pick and eat the berries? People usually...
The coldest, the windiest, the driest: the continent of Antarctica is a place of extremes. Located at the South Pole...
The belowground world is full of creatures that depend on plants as a food source. Belowground plant eaters, or...
Have you ever wondered where the water in your tap comes from? Or why rivers still flow, and lakes can still be full...
In recent times, scientists have seen large changes in our planet’s climate. Although climate change is a global issue...
Tea is a mix of natural plant chemicals dissolved in water. You should not drink it, but a weak tea drips through a...
The world is facing many problems nowadays, including a growing number of people living in cities, many of whom often...
