In the Know – Page 5

What Is Blue Light?

Do your eyes hurt after looking at screens for a long time? Some eyeglasses claim to protect our eyes from light coming from screens. Are these glasses necessary? Blue light is one of the colors … Read more

Flowers Bloom in Dallas, Texas

March is a special time in Texas. More than 100 festivals happen all around the state. These festivals are in big cities and in small towns. They celebrate many things, like music, food, art, history, … Read more

The Teenager Who Explored the South Pole

Did you know the United States had expeditions to Antarctica? It was on one of these expeditions in 1956 that the young Robert Barger III arrived on the icy continent. When Barger was 17, … Read more

Teeny Tiny, but Tough—Water Bears Can Survive the Most Extreme Conditions

Water bears are tiny animals with a hidden superpower. These cute creatures are nearly indestructible. Though they are sometimes called “bears,” the tiny animals are actually more similar to insects and spiders. Water bears have … Read more

Heroes of the Montgomery Bus Boycott

Not so long ago, many places in our country had laws that were unfair to Black people. These laws kept Black people and White people separate. For example, some places had laws that Black people … Read more

Gophers—Tiny, But Mighty Ecosystem Engineers

Gophers might be destructive in your yard, but scientists found that they have the opposite effect in recovering ecosystems. Mount St. Helens is a volcano in Washington state. It erupted in 1980 and destroyed miles … Read more

How Reading Influenced MLK’s ‘I Have a Dream’ Speech

January 20 is MLK Day. On this day we celebrate the life of Dr. Martin Luther King, Jr. Dr. King was an important civil rights leader in our country. He spent his life fighting for … Read more

Snowflake Science

This month we explore some fun facts about snow. Snow is NOT frozen rain. Sleet is frozen rain. Snow is frozen water vapor [the gas form of water]. Snow forms when water vapor changes into … Read more

A Short History of Food in Arizona

History is more than just a sequence of events. History is also about people and culture. You can learn much about Arizona’s history through food. Native peoples have lived in the Southwest United States for … Read more

Where Do You Get Your Traits?

Think about your traits (characteristics of living things). What color are your eyes? What color is your hair? How tall are you? You might share some traits with family members. There might be other traits … Read more