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During the daytime, when you look to the sky you can't see stars, or sometimes planets that you can see at night. While daylight is the obvious reason, at night we may not be able to see some of the good stuff because of different kind of light called light pollution.
This is a fun experiment that is easy to do and requires very little set up. I like to call it the "Invisible Extinguisher," since it puts a candle out by using what seems to be an empty glass.
or most of us, television has been around for most of our lives. A click of a remote, and information and entertainment appears before our eyes. A lot goes into making that seemingly easy thing happen, though.
We have done a lot of experiments and covered a lot of topics. This time, we are going to play around with density, and use its ingredients to make some weird science.
One of the most attention getting weather phenomena is the rainbow.
Some of the most important weather terminology for safety is often the most confused weather terminology. Those terms are "watch" and "warning".
Sometimes in science, things mix well, other things don't, and sometimes that mix takes time. That can be said for the Three Rivers, too.
You may have heard the scientific expression "An object at rest stays at rest."
Remember that one time in math class when you said, "I am never going to use this in real life"?
Pittsburgh has a lot of bridges -- 446 of them! With bridges, there are additional things to be alert for in colder weather, such as ice.
Late in winter, people usually start looking for signs that spring is on the way. The most popular is Punxsutawney Phil. The groundhog isn't the only animal though.
We have talked about how each snowfall is different. How snow is created is different, too.
The hardest season to predict weather is winter, mainly because of snow.
The Moon is neat to watch because it has several different looks during its 27 day cycle. It sometimes looks like a fingernail. Other times it looks like half of a pie, and other times it is a bright, shiny disk in the sky.
Often, I get asked, "Why are you called a meteorologist when you study and predict weather, not meteors?"
Did you ever notice your breath can heat and cool things? Meteorologist Ray Petelin shows us the science of how that works!
You certainly know the dark color of pop, but did you know you can use milk to take the color out of it? Ray Petelin shows you the science in a new Hey Ray!
Lighting a candle seems pretty normal, and pretty easy, but sometimes, the way it lights can be anything but normal. Ray Petelin breaks down the science in a new Hey Ray!
Have you ever been sitting around a campfire, get up and move, only to have the smoke you were trying to avoid follow you? Well, as Ray Petelin explains, there's a scientific reason for that!
Whether you call it pop or you call it soda, there's a way to make the can go pop without cracking the tab! Ray Petelin shows you how in a new Hey Ray!
Spots on the Sun's surface can tell us a lot about what is going on with the Solar Cycle. Ray Petelin explains why they're important to watch in a new Hey Ray!
You may have heard us talk about "meteorological seasons" that don't match up with the seasons you typically see on the calendar. While that may sound weird, there is a reason meteorologists use these different dates. Ray Petelin explains in a new Hey Ray!
One viewer wrote in to ask Ray Petelin, why do storms have different names around the world? Well, while it's true they do go by different names around the world, they're still the same kind of storms.
As summer winds down, we start to reach the peak of hurricane season, which leads to a lot of questions of how hurricanes form. Ray Petelin explains in a new Hey Ray.
Some kind of clouds can help predict the weather.
Kickoff between the Steelers and the Ravens today is set for 1:00 p.m. at M&T Bank Stadium in Baltimore.
The event was organized by North Braddock Mayor Cletus Lee as part of the Mayor's Charitable Fund that he leads.
For the fifth year, KDKA's team PTL has partnered with Charlie Batch's Batch-A-Toys to collect toy donations for children this Christmas.
The Pittsburgh Steelers are not expected to fire head coach Mike Tomlin before the end of the 2025 season.
Transportation Security Administration officers found the weapon within a passenger's carry-on bag around 4:45 a.m. Saturday.
A Pittsburgh attorney has filed a petition on behalf of the family of a Colombian man killed in a U.S. military strike on a boat in the Caribbean.
Republican Rep. Brian Fitzpatrick said he was readying a plan that would extend the Affordable Care Act subsidies for two years.
President Trump, facing criticism that he's focused more on international issues than kitchen-table concerns, will rev up his domestic messaging, two GOP sources said.
Authorities say the FBI has arrested a man suspected of placing pipe bombs outside RNC and DNC headquarters on the eve of the Jan. 6, 2021, Capitol riot.
The Trump administration says it will withhold funds for administering SNAP food aid in most Democratic-controlled states starting next week unless they provide data about those receiving the assistance.
Federal funding will finally be available to thousands of families in Pennsylvania to help pay their heating bills.
Electric prices in Pennsylvania are going up next month.
Saturday's grand opening included live music, food, and a meet-and-greet with Lego Master Krist Kay.
Thursday will be the first time many people cook and host Thanksgiving dinner - here's how you can avoid illness and danger.
To much fanfare, the 51st Aldi opened in the Pittsburgh area on Thursday morning.
Heather and David are taking a look back at the week.
The 5th annual PTL Toy Drive is tomorrow!
Downtown Pittsburgh is coming alive with a holiday flair.
For the first time in nearly a quarter century, the Pittsburgh Ballet Theatre is unveiling a brand-new version of "The Nutcracker."
The stars are in town for Steel City Con. Chris DeRose has more about what to expect.
Veterans are outraged after learning about damage done to gravesites at a cemetery in Fayette County.
Artificial intelligence is watching where people park in Pittsburgh.
Drivers who were convicted of infractions years ago are being told to surrender their licenses or file costly appeals because Allegheny County never processed the paperwork.
For most students, the most dangerous part of their day is going to and from school.
Shopping malls are under threat from online shopping and disappearing customers, and many are facing the wrecking ball.
A CDC vaccine panel voted to stop recommending the birth dose of the hepatitis B vaccine.
Western Pennsylvania counties are seeing vaccination rates fall among school-aged children.
The discussion happens every year: shoveling snow can lead to heart attacks, and one AHN cardiologist explains why it's a risk.
A little boy from Delaware County is getting his once-in-a-lifetime wish, just in time for the holidays.
Consumers with the imported pans should throw them away due to the severe health risks posed by lead, the agency warns.
Kickoff between the Steelers and the Ravens today is set for 1:00 p.m. at M&T Bank Stadium in Baltimore.
Western Pennsylvania has historically been a hotbed for producing talent that succeeds in the NFL.
The Pittsburgh Steelers are not expected to fire head coach Mike Tomlin before the end of the 2025 season.
The Pittsburgh Pirates claimed outfielder Marco Luciano off waivers from the San Francisco Giants on Friday.
The Penn State Nittany Lions will head to Yankee Stadium to play in the 2025 Bad Boy Mowers Pinstripe Bowl, according to multiple reports.
Members of the Newspaper Guild of Pittsburgh voted last week to end their three-year-long walkout.
Norfolk Southern railroad worked with the state of Ohio and Youngstown State University to revive plans for a $20 million first responder training center near the site of the worst derailment in a decade in East Palestine, Ohio.
A report on the future of water in central Ohio warns that industrial demands for water will skyrocket at the same time experts expect farmers will need to regularly irrigate their fields.
The U.S. Department of Energy says it's loaning $1 billion to help finance the restart of the nuclear power plant on Pennsylvania's Three Mile Island.
A new Barnes & Noble is coming to Pittsburgh.
Vanessa Hudgens and former Pittsburgh Pirates player Cole Tucker welcomed their second child.
Christina Aguilera and Liev Schreiber were spotted at Wednesday's Pittsburgh Penguins game at PPG Paints Arena.
Jimmy Cliff, who famously sang about the "many rivers" we all must cross, has died after suffering a seizure and pneumonia, his family say.
Donald Glover, who performs under the moniker Childish Gambino, revealed he suffered a stroke last year, which forced him to cancel his tour.
Fans of Jeff Goldblum are seeing double.
Pittsburgh-area mayors and U.S. Steel on Saturday night honored the 15-year-old boy who ran into a North Braddock burning home to rescue an elderly neighbor. KDKA-TV's Ricky Sayer has more.
Crews were dispatched to a house fire along Murrysville Road near Level Green, Westmoreland County, where authorities say a person was trapped inside the home before firefighters were able to rescue them.
For the fifth year, KDKA’s team PTL has partnered with Charlie Batch’s Batch-A-Toys to collect toy donations for children this Christmas. Jessica Riley shows how Pittsburgh is helping others in all the festive ways.
Stay on top of local weather with First Alert Meteorologist Trey Fulbright's forecast!
At least one person is dead after a shooting at a Westmoreland County Elks Lodge. KDKA-TV's Ricky Sayer has more.
Pitt's regular season has ended with an 8-4 record.
Pitt's five-game winning streak came to an end with a 37-15 loss to Notre Dame.
Mason Heintschel set a new Pitt freshman single-game passing record in the Pitt win at Acrisure Stadium.
The 44th annual KDKA-TV Turkey Fund will help our neighbors in need have a nice meal for Thanksgiving.
West Virginia scored a late touchdown to tie the game and then beat Pitt in overtime to win the 108th Backyard Brawl.
