PBS Anywhere

Providing Support for PBS.org

It’s Okay to Be Smart

This Is Not a Rainbow

Video duration: 3:17Video has closed captioning.

The furthest extremes of light refraction phenomena.

Episodes of It’s Okay to Be Smart135

Video thumbnail: It’s Okay to Be Smart How Do Squirrels Find Their Nuts?

It’s Okay to Be Smart

How Do Squirrels Find Their Nuts?

Astounding feats of animal memory.

2:08

How Do Squirrels Find Their Nuts?

2:08

Video thumbnail: It’s Okay to Be Smart 100,000,000 Years From Now

It’s Okay to Be Smart

100,000,000 Years From Now

What relics will the 'anthropocene' age leave behind?

5:28

100,000,000 Years From Now

5:28

Video thumbnail: It’s Okay to Be Smart Why Seasons Make No Sense

It’s Okay to Be Smart

Why Seasons Make No Sense

Day by day, country by country, we tend to measure seasons differently.

3:01

Why Seasons Make No Sense

3:01

Video thumbnail: It’s Okay to Be Smart Who Shares Your Birthday?

It’s Okay to Be Smart

Who Shares Your Birthday?

Birthday math has never been more fun.

5:16

Who Shares Your Birthday?

5:16

See all Episodes