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Posts tagged light

April 23, 2019


The Electric Color Elephantnose Fish

In 2018 biologists reported that the elephantnose fish can sense qualities they called “electric colors.”

May 25, 2018


Sleep 1 and Sleep 2

There's proof that until the 17th century, people's natural sleep patterns were to sleep when it first got dark, wake up for a few hours, and then have another extended sleep.

May 9, 2018


Your Phone And Computer Screens Are Keeping You Awake

The blue light from your phone can trick your retinal cells into thinking it's daytime.

May 3, 2018


The Elastic Ruler

Today, we have a simple activity about perception that you can accomplish with a pot of water and a ruler.

April 30, 2018


Spring Light

How do plants at the bottom of forest floors get enough light?

April 17, 2018


Polarized Lake Light

Sometimes, under the right circumstances, you'll see a mysterious dark patch in an otherwise wonderfully reflective lake. Why?

January 23, 2018


An iridescent soap bubble

Soap Bubbles and Butterflies

If you have some dish soap, a mug, and a bright light, we have a science experiment for you to try.

July 19, 2017


This image was created by taking a picture of a moving flashlight. It shows that light takes time to travel.

Light Takes Time

Learn how Roemer learned that light does take time to travel.

May 8, 2017


Where is your favorite place to stargaze?

Why Do Stars Twinkle?

Astronomers are learning more about the brightening and dimming of stars.

March 29, 2017



Why Red Eye?

Learn why you sometimes have glowing red eyes in photographs.

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