How many echoes does it take to make a Big Bang?

No idea? NASA's Dr. John Mather who won the 2006 Nobel Prize in Physics for measuring the echoes of the Big Bang and understanding how it happened, has answers. This is part of a new YouTube Q&A series called: "Ask a Nobel Laureate" hosted on the Nobel Prize YouTube channel.

Submit your question for Dr. Mather by attaching it as a video response to his call-out. How was the universe created? What does space smell like? Is there life on other planets?

Questions are due by October 30th, and should be less than 30 seconds. A selection of questions will be answered via video and posted to the Nobel channel.

An Astronaut Takes Your Questions Before Heading to Space

European Space Agency astronaut Frank De Winne is heading into space any day now as part of the OasISS mission to live on an International Space Station. But before his departure, he invited the YouTube community to ask him questions about space exploration and what it's really like to be an astronaut.

Here's Frank's original video asking for questions:



You can browse some of his responses here.

But don't miss Frank's response to a question posed by a student in Birmingham: "What is your view like from the space station?"



And curious what Frank does during his spare time in space?

NASA Taps YouTube for Social Media in Space

International Space Station astronaut Mark Polansky has just posted a video on NASA's YouTube channel inviting users to post questions to him using the video response format, and send him links via Twitter -- you can be one of the first to follow his channel here. He'll be responding (in space!) live on NASA Television.

Forty years ago this coming July 20th, Neil Armstrong broadcast his first steps on the moon to the world via flickery TV images. Today, NASA engages space-exploration fans via YouTube and social media. A small, and exciting step for a video sharing platform...