A Moment of Science

Posts tagged cones

May 9, 2012

 

reindeer

Reindeer Have Ultraviolet Vision

Scientists tested eighteen reindeer with light, and found that their eyes responded to both visible light and ultraviolet.

January 24, 2012

 

two people laying in the grass with their hands over their eyes

Night Vision And Humans: Why Can’t We See Color?

When we are in a fairly dark room, or outside at night away from lights, we can still see, but we can't see the colors of things very well. Why is that?

February 12, 2008

 

Cycad Tree in the Light

Odors That Push and Pull Pollinators

Ever notice how a little cologne can be attractive, but too much is totally repellent? That principle is used by cycads, an ancient type of cone-bearing tree.

August 2, 2007

 

Multicolored milk puddle

What’s So Primary about Primary Colors?

With three simple ingredients, a red, a green, and a blue spotlight, you can make any color of the rainbow. Learn more on this Moment of Science.

March 25, 2004

 

The Green Door

Learn about peripheral vision and color on this Moment of Science.

September 27, 2003

 

Star Light, Star White

The back of your eye, called the retina, has two kinds of cells: rods and cones. In bright light the cones are what we use, while in dim light the cones are less active and the rods take over.

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