Here's the riddle.

Happy Valentine's Day! We asked you which Radiolab stories are the most Valentine-y, and these are your top picks...all in a handy-dandy playlist.* We've got a message from Ancient Greece, some parasites, a seductive chatbot, a beguiling leopard seal, a falling out of love tale, an interstellar mixtape, and the epically romantic story of Emilie and Alan. Enjoy!

He was old, but not ancient, the man next to us at the delicatessen. It was 1973. My then girlfriend (now wife) and I had ordered dinner and this old guy, sitting by himself, seemed lonely, so we got talking and he told us how he had grown up in St. Petersburg, Russia, and that when he was a boy, his next-door neighbor was a famous man, a really famous man.

It's not like it hasn't been done before; it has. The problem is, it is so easy now, anyone can do it, and we'd never know because the tools are so subtle. I'm talking about doctored pictures — manipulating images, or what simpler folks call "lying." There used to be a saying on the Web: "Pictures, or it didn't happen." No more.

We've got eyes on the street in Miami...dancing eyes that are ready to blow some minds live at the Fillmore Miami Beach on Wednesday night! Join Jad & Robert, comedian Demetri Martin, and the amazing Thao Nguyen for In the Dark on 2/01. Grab tickets here.

Just a few more days before our live show at the Fillmore Miami Beach! Grab tickets for the 2/01 show here.

Thanks everybody, these 100 spots went fast! We've sent email confirmations to the first 100 volunteers to make the cut-off. Everyone else, we're sorry we couldn't fit you in this time--hopefully we'll be doing more events like this in the future, so definitely keep an eye on the blog. And thanks!

We're adding more dates and venues to our Radiolab Live: In the Dark tour--let us know where you'd like us stop!

For our latest hour, The Bad Show, I reported a piece about a psychologist who discovered that 91 percent of men and 84 percent of women have had at least one serious homicidal fantasy. And even though I believed him — he’s a respected scientist at a big university and his finding was based on a survey of 5,000 people — I kinda wondered: Really?

A listener named "Ovid" posted an intriguing comment on our Death Mask podcast--about yet another l'inconnue sighting. She lives! (And dies. And lives. Over and over again. And that's why we love her.) 

Look at this animal. ... What do you see? Or more importantly, what don't you see?

Happy holidays, everybody! Take a listen to Jad's message, and if you enjoyed the podcast this year, let us know right now with a contribution. You can donate online, or text "RL" to 25383, and a $10 donation will appear on your phone bill (messaging and data rates apply). Thanks!

We're really proud of the work we do here at Radiolab. And this past year, if you've been listening to the podcast, you've heard stories that we fought with and fell in love with and coaxed into being.

I’ve never really wanted a house.  Whatever gene makes people crave white picket fences, stainless steel appliances and perfectly manicured lawns, I don’t have it. And OK, sure, there’s a little corner of my brain where I fantasize about the kind of built-in bookshelves that require a rolling ladder, but for the most part my dream house is just a safe place to sleep when I’m well and truly exhausted.

Here's something you should know about yourself. Vowels control your brain.

Our producer Pat Walters recently traveled to Romania with a few other American reporters to teach some classes on narrative journalism to a group of Romanian writers. And, coincidentally, he had a run-in with a Radiolab regular. Sort of.

Interested in helping us make Radiolab?  We're now accepting applications for our spring internship!  Submit an application via the WNYC website.

He? She? It? Whoever it is, the Phantom Sculptor is suddenly back!

This is the the kind of book that makes me long for a headlamp and blanket fort--reading it is too much of an adventure for an armchair, or a park bench.