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2014-10-30 Geography - Civilizations:

Hi pow, all three had storage systems, all used stone to build their monumental structures,  all grew crops that were well suited to their environments;    Inca grew quinouis, potatoes, maize, curcubids

2014-10-30 Entomology (Study of Bugs) - Predatory insect:

Marlin:    Without seeing at least an image of the creature, I can only hazard a guess:    Praying mantis (yes, they can fly, at least the males)    Antlion (see my blog post here:  http://bugeric.blogspot

2014-10-30 Entomology (Study of Bugs) - dangerous spider uk:

Laura,    I can't see this clearly enough to be certain. The key characters are markings on the top of the abdomen which are not visible in this photo. While all spiders can bite there's been a great deal

2014-10-29 Relativity - Has Special Relativity Been Proved Wrong In The Following?:

Kinhang, the short answer to your question is no, and the proof is experimental.    Go to Wikipedia.com and search for Haefele and Keating or Time Dilation experiment.  These physicists tried  to disprove

2014-10-29 Astrophysics - Hubbles law and red shift:

You're making the classic mistake when you say that light that is 13.7 billion years old "would not" represent what "is" going on at the edge of the observable universe.  You have to get past notions like

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