A Link between Egypt and Americas?

According to the official view there was no contact between the Old World and the New World before Columbus. Yet numerous similarities have been found that suggest a link between Egypt and the Americas:

• · Both have huge pyramids, aligned to the cardinal points
• · Both have structures built with megalithic stones and extremely fine joints
• · Both exhibit intriguing bumps on many unfinished stone blocks
• · Both employed a unique style of construction using "L" shaped corners
• · Both use the same style of metal clamps to hold the huge stones in place
• · Both used the process of mummification to preserve and honor their dead

These compelling similarities suggest that both ancient cultures were influenced by a sophisticated common source.