Your brain does its best to inform you about the world around you, but sometimes it gets tricked. Enjoy eight optical illusions to test your brain's sensory input.

The solar system is full of strange things. But these three moons are especially strange, and kind of ... ugly.

This video, entitled "Verify Transformation Type," explains the different types of transformations that can occur with a two-dimensional figure.

This video, entitled "Two-Dimensional Figures," explains how to transform two-dimensional figures.

This video, entitled "Rotating Line Segments," explains how line segments can be rotated on a coordinate plane.

Elevate your routine with this rotation push up

Howcast - Learn how to do the basket step with rotation in merengue from professional dancers Ernesto Palma and Crystal Rodriguez in this Howcast dance video.

Howcast - Learn how to do Cuban motion when dancing merengue from professional dancers Ernesto Palma and Crystal Rodriguez in this Howcast dance video.

Howcast - Learn how to do toe rotations from certified reflexologist Chantel C. Lucier in this foot reflexology techniques video from Howcast.

Howcast - Learn how to do the rotation on the point foot reflexology technique from certified reflexologist Chantel C. Lucier in this Howcast video.

Howcast - Learn how to do five basic foot reflexology techniques from certified reflexologist Chantel C. Lucier in this Howcast video.

Howcast - Learn how to do a rotations, rotations dance move for an arm workout from fitness instructor Michelle Seabreeze in this Howcast dance workout video.

Howcast - Learn how to do the overhead clear shot from New York City Badminton's Chris Awong in this Howcast video. Thumbnail: BADMINTON by alainalele/Flickr

Howcast - Learn two backhand techniques from NYC Badminton's Chris Awong in this Howcast video. Thumbnail: IMG_0890_Web by Eric MARTEEL/ericmarteel/Flickr

Howcast - Learn how to grip your racket properly from New York City Badminton's Chris Awong in this Howcast video.

Howcast - Learn how to do a hula hoop vertical duck out from hula hooping expert Natalie "McFancy" Wise in this Howcast video.

Howcast - Learn how to do a hula hoop helicopter from hula hooping expert Natalie "McFancy" Wise in this Howcast video.

Howcast - Learn how to do the tin toss flair bartending move from mixologist Chris Cardone in this Howcast video.

Howcast - Learn how to do a 540 cab on a BMX from expert Francisco ColÃ_n in this Howcast video.

Howcast - Learn how to throw a chest pass from former top-ranking college basketball player Jason Curry in this Howcast video.

Howcast - Learn how to do a waltz jump on roller skates from former World Champion speed skater Gypsy Lucas in this Howcast video.

Howcast - Learn how to do a salchow on roller skates from former World Champion speed skater Gypsy Lucas in this Howcast video.

Howcast - Learn how to pick the right bowling ball coverstock from former PBA touring player Mike D'Ambrosio in this Howcast bowling video.

Howcast - Learn how to have good follow-through from former PBA touring player Mike D'Ambrosio in this Howcast bowling video.