(Image credit: knife Tate / Life"s small Mysteries)

During the brand-new DC Comics Universe series "Flashpoint," in i beg your pardon a time-traveling supervillain alters the past to warp the present, Life"s little Mysteries gift a 10-part collection that examines what would occur if a significant event in the history of the universe had gone simply slightly different.

You are watching: If earth were twice as massive but remained the same size, what would happen to the value of g?

Part 7: What if ... Planet were twice as big?

If Earth"s diameter to be doubled to about 16,000 miles, the planet"s fixed would boost eight times, and also the force of heaviness on the earth would be double as strong.

Life would be: Built and also proportioned differently.

If heaviness were twice as solid , bodies possessing the exact same construction and also mass as our flora and fauna would weigh double as much and also would collapse. It"d it is in "timber!" for tall, thick trees such together redwoods. Large, sunward-reaching plants can still develop, however would call for stiffer architectures that cellulose yarn or an additional material altogether.

Animals would need to be thicker-legged to assistance their weight. Together for humans, our appearance would depend on the evolution demands placed on our biological forebears in a higher-gravity world, claimed Neil Comins, a professor that physics in ~ the college of Maine. "If ours ancestors had actually to operation fast and fight hard, climate we would certainly be burly, but if not, we might be thin and light," Comins said Life"s little Mysteries.

Previously: What would life be favor if the moon had actually never formed ?

Next: What would certainly life be like if the sunlight were fifty percent its dimension ?


Adam Hadhazy is a contributing writer for Live Science and also Space.com. He often writes about physics, psychology, animal behavior and also story object in general that explore the blurring line between today"s science fiction and also tomorrow"s science fact. Adam has actually a master of Arts degree from the Arthur L. Carter Journalism institute at brand-new York University and also a Bachelor that Arts level from Boston College. Once not squeezing in reruns the Star Trek, Adam likes hurling a Frisbee or dining top top spicy food. Friend can examine out an ext of his occupational at www.adamhadhazy.com.
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