Calculating odds
Want to know how your luck will hold before you step out the door? There are Web sites dedicated to everyday odds, scientists have published books on the subject, and a Web series crunches the numbers for those with a pressing need to know exactly where they stand.

Click through this list of likelihoods to figure out whether you should run in fear or try your hand.

Lightning strikes
Being struck by lightning can affect a person mentally, physically, emotionally or worse.

Meteorite hits
A meteorite is an object from space, usually made of these materials, that survives impact with the earth's surface.

Plane crash
Fans of this suspenseful series may be wary of the dangers of flying. But for others, the friendly skies are the only option when it comes to travel.

Shark attack
Selachophobia sufferers and Peter Benchley fans may never wade in the surf 

Royal flush
Getting a royal flush in five-card poker will earn you ultimate bragging rights.

Winning the lottery
Lottery payoffs can differ depending on the state and the game. But for those aiming to try their luck, the Mega Millions prize is where the big money i

Car accidents
We all know the safety tips that help you arrive alive: buckle up for safety, don't drive drunk, minimize distractions. But sometimes tragedy strikes.

Four-leaf clover
For superstitious types, the four-leaf clover can help ward off bad omens, or help find these good ones.

Pearl in an oyster
Diamonds may be a girl's best friend, but for a unique gift, a pearl-filled Pinctada is hard to beat.

Giving birth to twins
Having twins can mean double the trouble, double the noise and double the parental pride when they're successful.

Factors affecting divorce run the gamut from money squabbles, to irreconcilable differences, to headline-grabbing reasons such as this one.

Identity theft
The Federal Trade Commission estimates this many Americans have their personal info stolen each year. Thieves can strike in public or online.

Killer tornadoes
If only all tornadoes were about ruby slippers and Emerald Cities. Alas, twisters can be nasty business, as we saw last year.