Top 4 Strange Lion Facts

1. Rub-a-Dub-Dub
Male and females greet each other not with a handshake but with a rub, which sometimes becomes so vigorous that one gets knocked down in the process. The act is meant as a means of bonding, as lions leave scent markings on each other during the process, similar to how house cats rub up against their pet parents to demonstrate ownership (but hopefully, with less injury!).

2. Armed to the Teeth
A lion's back teeth (called carnassals) work like a pair of scissors, which comes in handy when tackling a fresh piece of meat. Though the teeth help cut up their meals, lions don't actually chew their food, but rather swallow it in chunks, using only one side of their mouth at a time.

3. A Manicurist's Nightmare
A lion's claws are not only very sharp, but also retractable, which helps maintain the big cat's slice-and-dice capabilities by preventing injury during play. Their claws grow as a series of layers. These eventually shred to expose new claws that can reach lengths of up to 1 1/2 inches from the base to tip.

4. Tantalizing Tail
The lion is the only member of the cat family with a tasseled tail, which serves a purpose beyond aesthetics. It's often used to signal to other members of the pride, with messages ranging from directional, "this way" commands to flirtatious, "come hither" invitations!

10 funny facts about Mark Zuckerberg

1. Zuckerberg suffers from red-green colorblindness and sees the color blue best, which is why blue dominates Facebook's color scheme.
2. AOL and Microsoft tried to recruit him when he was in high school after he created Synapse, a program that used artificial intelligence to learn users' music-listening habits.
3. He wears the same gray Facebook T-shirt almost every day because he's busy and it saves him time in the morning.
4. Despite Zuckerberg's casual wardrobe, he said he wore a tie every day in 2009 to show that Facebook was serious about growing in the face of the global recession.
5. He is a vegetarian and once said he will only eat meat if he has killed the animal himself. But among his "likes" on his Facebook page are McDonald's and In-N-Out Burger.
6. He has amassed 220,000 Twitter followers despite the fact that he's only tweeted 19 times in four years, and not once in 15 months.
7. In October 2010, Zuckerberg took a bunch of Facebook staffers to a public theater to see "The Social Network," the movie about the founding of Facebook. In public comments afterward, he criticized the film's portrayal of him as someone who invented Facebook to gain social status.
8. He owns a Hungarian sheepdog named Beast, who has a Facebook page with 1.5 million fans.
9. He took some heat last year for giving his wife, Priscilla Chan, a ruby wedding ring that jewelers valued at about $25,000 even though he was worth about $19 billion at the time.
10. If you type @[4:0] in a Facebook comment window and hit enter, his name will appear.
What, if anything, fascinates you about Zuckerberg? Let us know in the comments.