Unusual Chemicals

Water Silicon and Gallium all expand when they solidify. Most materials shrink when they solidify if they're melted. 

Gallium is the only metal that expands when it solidifies. It melts slightly above room temperature at 29.76 °c. It melts in the palm of your hand and if it is in a rigid airtight glass container, it would break the container when it solidifies again. 

What Trees Are Made of

Almost all of a tree's mass comes from the air. The tree will take carbon dioxide from the air and water; it will use solar energy to split the water molecules and combine them to the carbon atoms freed from the carbon dioxide and release the oxygen as a waste product. 

The root of a tree doesn't use anything in the soil except some nitrate compounds but they are almost nothing. Using air water and sunlight, a tree self assembles into a giant wooden structure that towers over all the animals. 

Read more thought provoking articles 

Alan's Public Diary 

https://alspresso.blogspot.com/

Mr Cheerman

https://jokejohn.blogspot.com/

Daily Facts

https://riddlebooth.blogspot.com/