(NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington)
In case you missed it, last week the ScienceAlert team shared their favorite science facts for you to use as conversation starters over the 4th of July weekend.We all enjoyed them so much we thought we'd ask you, our loyal readers, for your own go-to science facts to inspire family and friends.And, wow, you guys blew us away!We had more than 500 responses from our readers. Below are our favorites."Every breath you take contains air molecules that were also breathed by pretty much every other person in history."– Joseph Johnson"If you scale our Solar System down to the size of a red blood cell, the Milky Way would be the size of the United States."– Huw F. Rees"The thickness of Earth's atmosphere relative to the planet is roughly the same as the skin on an apple."– Louis Macallistar-Menzies"When you look at the night sky, you are literally looking back in time – some of those stars no longer exist."– Rebecca Congreve"Coyotes can't go extinct. If a pregnant female howls and doesn't hear a response from another expecting mother, she can nearly double the size of her litter."– Joshua Riley"The Sun is about 400 times wider than the Moon, but also about 400 times farther away – which is why they appear the same size in our sky. No other planet in the Solar System has this."– Michael O'Brien
