wow i didnt know that your eyes can develop colors we see in our retinas that send waves to our brain.

omg this artical is super cool. iI had no idea that dogs can tell your face.

This is so cool. I never knew that dogs were that good at telling if you are happy or angry.

It is amazing how the water freezed up and formed the waterfall and the snow volcano

wow that is really cool i never knew about that i never knew that was a tradition

This article is so cool and I love how it kind of gives you lots of details so that you can understand how daylight savings time became a tradition.

This is magnificent! I wonder what they tell us. The may tell us more about our ancestors.

Wow those are really old scrolls how did they survive the Pompeii incident that is some strong paper

The video is so interesting and i can't believe Richard Nixon played the most instruments.I also think it should of had a bit more information about it,but the video did give a little bit more information about the presidents.

the video was very interesting and I liked it but they should have had all the presidents in order