BIRMINGHAM, AL (WBRC)- It's been around since the 17th century, so why is it that so many of us are still lost when it comes to tipping? Who gets one, when and how much?

"People that tip really well, that's one thing people should know, it changes that waiters day," waiter Stuart Bond said.

But just because tips make people in the service industry feel good and for some are what they depend on does not mean they will always see one.

"I look at tipping as you're in Vegas rolling dice. It's a crap shoot. I've had some tips when it's just 0," waiter Tony Taylor said.

In today's fast-paced world where there are more and more services offered at our fingertips, knowing when, who and how much to tip can be daunting.

A movie review of Safe Haven, a film based on a Nicolas Sparks novel.

By by Michael Perry, Allison Edwards, and Mercer Morrison from our sister station WDAM.

FRIDAY, May 3 (HealthDay News) -- A much larger or much smaller birth weight than average may be associated with an increased risk of autism, according to a large new study.

Researchers examined data from more than 40,000 children in Sweden, and found that those who weighed more than 9.9 pounds or less than 5.5 pounds at birth were more likely to have autism than those with a normal birth weight.

Specifically, smaller babies had a 63 percent greater risk, and larger babies had a 60 percent greater risk. The link between birth weight and autism risk was independent of whether or not a baby was born premature or past the normal delivery date.

Autism is a neurodevelopmental disorder that affect a person's ability to communicate and interact socially.