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Learn how to use SI units. Visit categories under the Learn tab. The categories are: Length – Area – Volume – Mass – Cooking – Clothing – Time Zone – Energy – Fuel Economy – Online Conversion – Book – Science

Primate Hands Ten Count

Primate Hands Ten Count

General consensus among archaeologists is that human life has its origins in the East African Rift Valley 2.5 to 2 Ma* ago. So no matter where you try to trace your ancestry from (whether you identify as Chinese, Czech, Chechen, Greek, Roman, Arab, Jew, Inca, or even Australian Aboriginal or American Indian) all humanoids ultimately emerged from a branch of primates from Africa. We are all descendants of our Paleolithic ancestors, ultimately quite African, having migrated prehistorically in successive waves to nearly every patch of habitable space on Earth.

Ma (for megaannus) is a unit of time equal to one million (1 000 000) years. It is commonly used in scientific disciplines such as geology, paleontology, and celestial mechanics to signify very long time periods into the past or future. For example, the dinosaur species Tyrannosaurus Rex was abundant approximately 66 Ma (66 000 000 years) ago (ago may not always be mentioned; if the quantity is specified while not explicitly discussing a duration, one can assume that ago is implied; the alternative mya unit includes ago explicitly). In astronomical applications, the year used is the Julian year of precisely 365.25 days. In geology and paleontology, the year is not so precise and varies depending on the author. http://en.wikipedia.org/wiki/Megaannum#SI_prefix_multipliers

Arabic Alphabet

Arabic Alphabet

Arabic Alphabet – Read both Arabic and Hebrew from right to left. Isolated Initial Medial Final

Hebrew Alphabet

Hebrew Alphabet

Hebrew Alphabet – Read both Arabic and Hebrew from right to left.

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