If you had a sudden urge to put a horn on your head, not use your knees and chew on some leaves, you may be catching the spirit of World Rhino Day. It's being celebrated all over the world with art shows, auctions, walk-a-thons and lectures with the theme of "Five Rhino Species Forever."

A reminder from weekends on All Things Considered guest host Jacki Lyden that Round 9 of Three-Minute Fiction is still open for submissions. Our judge, Brad Meltzer, is looking for an original short story that revolves around a U.S. president — fictional or real — in under 600 words. Listeners can submit their story online at www.npr.org/threeminutefiction. The deadline for submissions is Sunday, September 23, at 11:59 p.m. ET.

So far in this presidential campaign, the two main contestants have managed to keep details of their plans for the White House remarkably vague. Weekends on All Things Considered guest host Jacki Lyden speaks with James Fallows of The Atlantic about what he'd like to hear once they share the same stage at the first debate.

In a move to perhaps change the topic after a turbulent few weeks, Republican presidential candidate Mitt Romney released his 2011 tax returns. But the move has not silenced his critics. With just 45 days until Election Day, weekends on All Things Considered guest host Jacki Lyden speaks with NPR's White House Correspondent Ari Shapiro about the candidate's next steps.

Fresh Air Weekend

In the 1980s, Elliott Sharp was the height of New York City cool, a central part of that town's experimental music scene. His creations were inspired by advanced mathematical concepts. He tuned his guitars according to the Fibonacci Sequence and wrote challenging pieces inspired by fractal geometry.

As I write this I'm certain that there are people at Google smiling. I'd venture to say CEO Larry Page may actually be laughing. Why? Because everyone is complaining about Apple's new mapping system — the one that replaced Google Maps in Apple's newest mobile operating system.

Residents of Bulawayo, Zimbabwe, are engaging in a community-wide flushing of toilets today.

Is it a symbolic washing away of waste? A sign of protest? A commode "flash mob?"

None of the above.

The emoticon, punctuation to depict a facial expression, began 30 years ago this week. Using three keystrokes, the colon, dash and parenthesis, to suggest a smile may not be a great scientific advance, like the coronary stent or computer chip. But the emoticon has been simple, useful and enduring.

There had been previous hints of emoticons. A newspaper transcript of Abraham Lincoln drawing a laugh in 1862 follows it with a semi-colon and parentheses, but that may have simply been a printer's typo.