Bianna Golodryga speaks to military analyst and retired U.S. Air Force Colonel Cedric Leighton about Ukraine’s large-scale ...

It is an interesting experiment that can be done at home with just a few things. The point of the video is to illustrate how important heat is to start a fire and how the medium is not too important.

This film explores how water is transported from the roots, through the tubes in the stem, to the tip of the plant. The process is demonstrated with an experiment. White carnations are placed in ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. In the 1931 movie ...