Scientists are now able to grow 'beating' heart tissue in a lab!
162
One ragweed plant can release as many as one billion grains of pollen!
51
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
German chemists made a replica of a trophy the size of one molecule.
68
A cubic yard of air weighs about 2 pounds at sea level.
31
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
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
The only letter not appearing on the Periodic Table is the letter "J".
180