Adam Cole

Your body needs oxygen to function — and that was true even before you were born. As you grew inside your mother's womb, even before you had working lungs, your cells were crying out for oxygen. And your mother kindly answered that call. Oxygen and nutrients from her blood made their way down your umbilical cord, through your belly button, and fueled your body.

Love is complicated, scientifically speaking. There's no single, specific "love chemical" that surges through our bodies when we see our beloved, and we can't point to a specific corner of the brain where love resides.

Tuesday is an anniversary worth noting: On Jan. 30, 1868, Charles Darwin published a follow-up to his masterpiece On The Origin Of Species. This less-popular tome (897 pages!) contained a vexing puzzle:

Why do pets and livestock tend to have "drooping ears?"

Updated at 5:15 p.m. ET Sept. 14

The Cassini spacecraft's final moments are a few hours away. Early Friday morning, it will slam itself into Saturn's atmosphere.

In July of 1878, Vassar professor Maria Mitchell led a team of astronomers to the new state of Colorado to observe a total solar eclipse. In a field outside of Denver, they watched as the sun went dark and a feathery fan of bright tendrils — the solar corona — faded into view.

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NPR's YouTube channel, Skunk Bear, answers your science questions. This week, we picked one in honor of David Bowie.

This winter brings the latest installment of the Star Wars franchise, full of familiar costumes, familiar villains, and the familiar "pew pew pew" of space guns. But you can skip the movie theatre and still hear those iconic blaster sounds if you visit a frozen lake.

Grant Ernhart works with the U.S. Biathlon Team, so he spends a lot of time among snow-capped mountains. From the Canadian Rockies, he lobbed a question to Skunk Bear, NPR's science YouTube channel.

The Amorphophallus titanum is a striking plant even before you get close enough to smell it. Its scientific name means giant, misshapen phallus and it is not hard to see why. A giant column called a spadix rises 7 feet into the air from the center of a pleated funnel.

The latest episode of the podcast Invisibilia explores the idea that personality — something a lot of us think of as immutable — can change over time.

At the end of 2013, snowy owls started showing up far south of their usual winter range. The big white birds were reported in South Carolina, Georgia, even Florida.

Dave Brinker, an ecologist with the Maryland Department of Natural Resources, had never seen anything like it.

Finding success in science requires smarts, determination — and sometimes a bit of luck. NPR's Skunk Bear created the Golden Mole Award For Accidental Brilliance to celebrate that last part.

Author Isaac Asimov once wrote, "The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but, 'That's funny ... ' "

Good scientists search for the significance of surprises, coincidences and mistakes. With a little curiosity and perseverance, they can turn unexpected incidents into new insights.

The history of science is full of happy accidents — most folks have heard that penicillin was discovered in 1928, when a few mold spores landed on some neglected petri dishes in a London lab. But sometimes serendipity's role is a bit less ... mainstream.

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