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Live Science crossword puzzle #20: Largest contiguous land empire in history — 3 down
Science crossword Test your knowledge on all things science with our weekly, free crossword puzzle!
Live Science crossword puzzle #19: Tallest mountain in Africa — 12 across
Science crossword Test your knowledge on all things science with our weekly, free crossword puzzle!
Gold and gems quiz: What do you know about sparkly treasures made by nature?
Think you know a lot about jewels? Can you make this whole quiz shimmer?
Live Science crossword puzzle #18: First human-made satellite in space — 11 across
Science crossword Test your knowledge on all things science with our weekly, free crossword puzzle!
Live Science crossword puzzle #17: Multiple realities stacked on top of one another — 5 down
Science crossword Test your knowledge on all things science with our weekly, free crossword puzzle!
Live Science crossword puzzle #16: Famous female Australopithecus skeleton — 5 down
Science crossword Test your knowledge on all things science with our weekly, free crossword puzzle!
Fruits and vegetables quiz: Do you know where pumpkins, blueberries and broccoli come from?
Do you know where your staple fruits and vegetables were domesticated? Take Live Science's quiz to find out.
Live Science crossword puzzle #15: Explosive death of a star — 11 down
Science crossword Test your knowledge on all things science with our weekly, free crossword puzzle!
