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30 seconds to know
30 seconds to know
12 hours
Patti Blake / News Herald via AP
PLAY VIDEO
How Can I Make My Christmas Tree Last?
New York Tree Farmer Kurt Emmerich explains how to make your Christmas tree last through the holidays.
30 seconds to know
10 days
YANNIS BEHRAKIS / Reuters
PLAY VIDEO
What Causes the Northern Lights?
York College Astronomer Tim Paglione explains how the Northern Lights form.
30 seconds to know
10 days
TIMOTHY CLARY / AFP/Getty Images file
PLAY VIDEO
What Does It Take to Be a Macy's Parade Balloon?
Macy's Studio Vice President John Piper explains what's in the job description for Thanksgiving parade balloons.
30 seconds to know
10 days
Jonathan Ferrey / Getty Images
FROM NBC Sports
Why a College Mascot Resembles a Disney Character
NBCSports.com Host Jenna Corrado examines the similarities between Oregon's mascot and a certain Disney character.
30 seconds to know
12 days
ASSOCIATED PRESS
FROM MSNBC.COM
What Is a Grand Jury?
Attorney Seema Iyer explains the relationship between the grand jury and the prosecution and what follows from a grand jury investigation.
30 seconds to know
16 days
Getty Images
FROM NBC Sports
What is 'Touchdown Jesus?'
"Touchdown Jesus" is a huge deal at Notre Dame, so what is it?
30 seconds to know
17 days
PLAY VIDEO
What Is Lake-Effect Snow?
NBC News Meteorologist Domenica Davis explains what causes lake-effect snow.
30 seconds to know
17 days
Justin Sullivan / Getty Images file
PLAY VIDEO
What Is Bricking?
Julianne Pepitone
Bricking is something that could happen to your mobile devices and it could be a major headache.
30 seconds to know
18 days
Jared Silber / NHLI via Getty Images
FROM NBC Sports
How Does an NHL Shootout Work?
Liam McHugh and Jeremy Roenick explain the format for NHL regular season shootouts.
30 seconds to know
23 days
Matt Sullivan Photography / Getty Images
FROM NBC Sports
How Does NASCAR's Championship Round Work?
NASCAR Analyst Kyle Petty explains how the Chase Cup's championship round works.
30 seconds to know
25 days
Ali Jarekji / REUTERS file
PLAY VIDEO
What's the Difference Between Asteroids and Comets?
York College Astronomer Tim Paglione explains what sets apart asteroids and comets.
30 seconds to know
28 days
Salih Zeki Fazlioglu / Anadolu Agency via Getty Images
PLAY VIDEO
Why Do Religions Keep Fighting Over This Holy Site?
Bill Neely
There has been another flare-up of tensions in the Middle East over Jerusalem's holiest site.
30 seconds to know
29 days
PLAY VIDEO
What Triggers a Tsunami?
Bill Karins
NBC News Meteorologist Bill Karins explains the science behind what sets off most tsunamis.
30 seconds to know
31 days
Ye Aung Thu / AFP - Getty Images
PLAY VIDEO
Space Out: What Is a Goldilocks Planet?
Columbia University Astrophysicist Summer Ash explains what makes a planet a Goldilocks planet.
30 seconds to know
32 days
Rob Carr / Getty Images
FROM NBC Sports
What is 'First Down Moses?'
Notre Dame Football Host Liam McHugh takes a look at one of the treasures of Notre Dame.
30 seconds to know
35 days
AFP/Getty Images
PLAY VIDEO
Why Do Wireless Carriers Intentionally Slow Internet Speed?
Julianne Pepitone
Unlimited data plans are no longer what they used to be.
30 seconds to know
38 days
Wesley Hitt / Getty Images
FROM NBC Sports
How Does the NCAA Football Playoff Work?
Heisman trophy winner Doug Flutie explains the new college football playoff.
30 seconds to know
39 days
DAVID J. PHILLIP / AP file
PLAY VIDEO
Why Aren't Death Row Executions Televised?
Death Penalty Information Center Executive Director Richard Dieter explains why the public is not allowed to view the executions of death row inmates.
30 seconds to know
40 days
Spencer Platt / Getty Images
FROM CNBC.com
Overbought vs. Oversold: What's the Difference?
Recent market volatility has made it important for investors to understand the difference between overbought and oversold price extremes.
30 seconds to know
46 days
PLAY VIDEO
What Makes a Storm a Nor'easter?
Bill Karins
A nor'easter is a low-pressure storm that usually develop between Georgia and New Jersey.
30 seconds to know
49 days
ISIS Propaganda Video via FBI
PLAY VIDEO
Who Is ISIS Trying to Reach With Beheading Videos?
RAND's Brian Michael Jenkins explains that the aim of beheadings by ISIS is not just to shock the West.
30 seconds to know
51 days
Bruce Bennett / Getty Images
FROM NBC Sports
Hockey Is Back: What's a Penalty Kill?
NHL has many rules in place to prevent illegal plays, one being the penalty kill.
30 seconds to know
53 days
Shannan Bowen / AP
PLAY VIDEO
What Time Do Tornadoes Tend to Strike?
Bill Karins
Tornadoes tend to strike during a certain period of the day. But why?
30 seconds to know
56 days
Don Farrall / Getty Images
PLAY VIDEO
Listen Up: How Do Phone Apps Recognize Songs?
Julianne Pepitone
An app like Shazam is able to identify what song is playing around you in a matter of seconds. It works through a process called audio fingerprinting.