Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
One ragweed plant can release as many as one billion grains of pollen!
51
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
Most dust particles in your house come from dead skin.
48
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Balsa wood is classified as a hard wood!
41