Requirements for an ice age on Earth include:
A) a weaker Sun.
B) continents located at low latitudes.
C) larger obliquity angle.
D) smaller obliquity angle.
E) continents located at high latitudes.
Question 2
Which is NOT true about Celtic languages?
A) They were threatened by extinction in England.
B) They are still spoken by people in France.
C) They have been revived in some parts of the British Isles.
D) They have an extensive body of literature.
E) They share common language structure with Finnish and Hungarian.
Multiple crossovers can include more than two chromatids
Photosynthetic Organisms Changed Earth's Atmosphere
Rivers on Mars and Earth
El Anatsui, Between Earth and Heaven.
Distance from Earth to Sun schematic
Earth’s Oldest Preserved Rocks – 3.8 Billion Years Old, Greenland