What is the current axial tilt of the earth?
A) 24 degrees B) 45 degrees C) 21.5 degrees D) 23.5 degrees
Question 2
The Kurgans, identified as the first Proto-Indo-European speakers by archaeologist Marija Gimbutas
A) conquered much of East Asia several thousand years ago.
B) were a Germanic tribe that invaded England.
C) were herders from the steppes of today's Russia and Kazakhstan.
D) preserved Basque in present-day Spain.
E) were the earliest speakers of Sino-Caucasian, which they diffused through conquest.
Annual net primary productivity on Earth.
The Sun as it appears from the surface of Earth during the middle of the day
David P. Bradley (White Earth Oijbwe, and Mdewakaton Dakota), Indian Country Today.
Earth’s Revolution
Earth’s Layered Structure
Chilling Effect of a Cold Current