If there was a theme this week it would be gravity and levity.
The first video shows the seriousness of what the Ebola virus does to the human body, while making the point that despite it being a terrible infection, there are many more that prove more deadly because they are so much easier to contract. In a Nutshell has a bunch of well presented videos on important issues.
#AlexfromTarget is a 16-year-old grocery packer, someone took a picture while he was working and thanks to what must have been legions of girls the trend took off.
As soon as it appeared on the radar for traditional media Alex Lee's life was destined to change, even if just for 15 minutes. He went from 144 followers on Twitter to his current 690 000. He joined Ellen to tell his story.
Galileo dropped two balls of differing mass from the leaning Tower of Pisa in 1589. At the time some thought the heavier ball would fall faster. If you had not thought about it before, you may have wondered what would happen too. The BBC recently replicated the experiment on a grand scale dropping feathers and a bowling ball inside an enormous hanger. Under normal circumstances the feathers would fall slower as a result of the air resistance, but this was a massive vacuum.