Alison Kruse doesn't know how to classify some of the things she sees from her Murrysville home, but she's sharing them with the world through YouTube.
Kruse has posted more than 100 videos to her YouTube channel of unexplained sightings in the sky near the Murrysville area. Though she isn't sure what the balls of light are, she is sure that they are not local.
"Well, I think they're not from our neighborhood or our country so I'm calling them 'aliens,' " Kruse said.
Since Kruse began posting videos about a year ago, she has heard from people throughout the world and the Pittsburgh region who say they have made similar sightings. She said she hopes more people are willing to keep an open mind and keep their eyes on the sky.
"People are missing out," Kruse said. "This is a history-making thing."
Dan Page, who is from the Pittsburgh area but declined to give his hometown, said he found Kruse's videos after he saw an airborne, mysterious light source.
"It's amazing what's out there when you look," Page said.
Sarah Mazzie of Penn Township said unexplained sights in the sky have fascinated her for several years.
"You see them all the time," she said. "You have to wonder what they are." Kruse said she has received a positive reaction from many who have viewed her videos.
"I try to keep an open mind and document what I see and put it out there. I got a lot of comments from people who are glad," Kruse said.
However, with a large number of online postings, Kruse has attracted her share of critics. She said anyone who has doubts about the things seen in the sky could research their sightings.
"If you have a feeling that something isn't right when you're looking at it in the sky, there are always ways to verify it," Kruse said.
Kruse said people should question the things they see and not rely on explanations to be given to them.
"There are a bunch of questions, and nobody is going to explain it to us," Kruse said.
With her video equipment in hand, Kruse said she will continue to document mysterious objects whenever they appear.
"It's been a very interesting hobby to document these things," Kruse said.
