Historical Biogeography

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T H B J B Q B N R M T T E E P U A E X B C
Y U P V E L U O M N A S Y S R P I G S Q E
C A M B R I A N E X P L O S I O N L A D N
O G F O U R K U A P Y K O P B C N Y Y K E
J E V O L U T I O N O F H O M I N I D S Y
L B I G B A N G E A R T H C R E A T E D X
I Q I P Y X C B U G V Q H V R D U J N X A
K T B Q A W N F C M P C M V Y Y P P P L R
J U X B C U X H V B M L W K F L W H P F Q
H R R A D J T L A O M N O N S M S C U W G
A D O J O C T U V V X E O N B B W N H I T
C X S V Q X A T T D Y O D K Y J O U Q A J
B Q K V Q V L G U O F S D V Y K C B W G T
A I H C M M T U I T N C K W U C D A X F B
K O R I G I N O F L I F E O N E A R T H B
U S P E B G W C I Q C F E W V S T M I O H
S N E S Q G M R A V Q B I B U V A E W O X
G D I Y J J P R S O B L D Q L W B V W U E
M Y G M S F G J B W O S Y F M J U B B R F
N W P V C A Y D R A M Y V Y Q K D O M G R
G O T K F C M E C A Y V F B B P T H W K F

Clues

  • 3.8-3.9bn years (6, 2, 4, 2, 5)
  • 4.6bn years (3, 4, 5, 7)
  • 540Ma (8, 9)
  • 5Ma (Quaternary) (9, 2, 8)

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