In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
One barrel of petroleum holds 42 gallons.
20
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Aluminum used to be more valuable than gold!
84
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Balsa wood is classified as a hard wood!
41