My Crossword Maker Logo
Powered by BrightSprout
Save Status:
or to save your progress. The page will not refresh.
Controls:
SPACEBAR SWITCHES TYPING DIRECTION
Answer Key:
Edit a Copy:
Make Your Own:
Crucigrama Sopa de Letras Hoja de Trabajo
Calificar este Puzzle:
Log in or sign up to rate this puzzle.

By their numbers...

Horizontales
Giant dinosaurs, first birds, conifer and cycads abundant over 206 million years ago
End of the dinosaurs. Amonites die out. Mammals and birds show adaptation. Flowering plants and hard wood trees appear over 144 million years ago
Mammals progress, cats and dog develop and diverge. Elephants appears in Africa over 34 million years ago
Many new mammals over 65 million years ago
Sharks, amphibians and crinoids flourish. Seed ferns and conifers abundant over 354 million years ago
Age of humans. 10,000 years to the present.
Hominids appear. Modern Horses, Camels and Elephants develop. Sequoias decline and tropical jungles and trees driven south over 5 million years ago
Horses migrate to Asia the and the Elephants into Americas. Grazing animals thrive ove 25 million years ago
First reptiles, giant insects, spore bearing plants and amphibians flourish over 323 million years ago
Reptiles thrive, massive forests of conifers and cycads over 248 millions years ago
First amphiians and first forests; fish thrive over 417 million years ago
Verticales
Formation of Earth's crust, over 3.8 billion years ago
First ancestors of early horse and other mammals, early whales. Diatomes and flowering plants thrive over 55 million years ago
Period when marine invertebrates thrive over 490 million years ago
First land plants and animals (Spiders, scorpions. Fish develop and marine invertebrates thrive over 443 million years ago
Formation of simple marine organisms over 2.5 billion years ago
Further development of hominids. Elephants further develop in North America and then die out over 2 million years ago.
One of the largest mass extinctions. Trilobites, seed ferns, scale trees die out; corals thrive and abundant over 290 million years age
First vertebrates (fish). Many marine invertebrates (trilobites and shelled animals seaweed over 543 million years ago