The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Out of all the senses, smell is most closely linked to memory.
146
The smell of freshly cut grass is actually a plant distress call.
31
Pure water (H2O) does not conduct electricity on its own.
46
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6