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Science, Math & Nature

Across
Father of modern physics
Thickest layer of Earth
Second element on the periodic table
Newton's laws of ____
Transports oxygen to and from the tissues
Elementary particle that is a unit of light
These crustaceans don't die of old age
Positively charged subatomic particle
A fundamental relation among three sides of a right triangle
Down
Majority of the sun is made up of ______
A system of rapid mental math calculation
68% of the universe
An element that is liquid at room temperature and pressure
Lowest level of the atmosphere
Planet with the most moons
This fruit takes two years to grow
Nocturnal birds that don't have eyeballs