KUCB KIAL Unalaska Community Broadcasting

Adam Cole

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.

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