This week's From the Lab video explores Nasa’s continuous problem with space junk. More than 100 million human-made pieces of space junk orbit the Earth, and all these pieces of space dust could potentially cause damage to the International Space Station. While debris as small as three millimetres can be tracked from Earth, smaller particles can still cause considerable damage. Subscribe to our YouTube channel for more From the Lab videos: http://bit.ly/2BjaZio | Science Museum