Roots | Science for Kids

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#roots

Those spines on a cactus?

They're actually leaves - leaves that evolved over millions of years into sharp needles.

And that's just the beginning of how weird and clever cacti really are.

In this video, we break down exactly how a cactus stores water, why its spines do three different jobs, how its roots work, and why the saguaro takes 75 years just to grow its first arm.

What you'll learn:

- Why cacti have no leaves - and what does their job instead

- How the stem works as a water storage tank

- The three things cactus spines actually do (protecting is just one of them)

- How saguaro roots spread 100 feet wide to catch rain

- Why saguaro flowers only bloom for one night - and who pollinates them

0:00 - Spines are actually leaves

0:38 - The stem is the whole plant

1:05 - What spines really do

1:32 - How the roots work

1:58 - The saguaro cactus

2:22 - 3 fun facts

3:08 - Closing