b. The Egyptians could have traded with America more than 3000 years ago.

c. Traces of tobacco found in Egyptian mummies may have come from Central America

d. The discovery of silk in mummies also suggests that the Egyptians could have traded with China

e. And because there are pyramids in Central America, the Mayas might have got the idea for pyramids from Egypt.

f. On the other hand, as Egyptians pyramids and Maya pyramiades are so different, the two civilizations may have had similar ideas

g. There has even been a claim that aliens from another planet might have built the Mayan pyramids

h. According to this theory, the aliens could have used the pyramids as landing places for their flying saucers