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Live Science crossword puzzle #18: First human-made satellite in space — 11 acrossScience crossword Test your knowledge on all things science with our weekly, free crossword puzzle!
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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!
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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!
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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.
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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!
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Human skeleton quiz: What do you know about the bones in your body?Do you have what it takes to be a bone-ified quiz champion?
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Live Science crossword puzzle #14: Fast dinosaur with a killer toe claw — 14 across
Science crossword Test your knowledge on all things science with our weekly, free crossword puzzle!
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Live Science crossword puzzle #13: Biggest country on Earth (by land area) — 7 down
Science crossword Test your knowledge on all things science with our weekly, free crossword puzzle!
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Heart quiz: What do you know about the body's hardest-working muscle?Get pumped up — it's time to show off your knowledge about the heart.
