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More than 400,000 children in the United States suffer from epileptic seizures.
Because of Charlotte and the other patients, we have been able to collect data to help with dosing for other families and other people who are on the medicine.
Recently, families with children suffering from epilepsy have been moving to Colorado. The big draw is the state's liberal marijuana laws and a special oil called 'Charlotte's web' which uses low THC and high CBD, which is the medicinal extract from the drug.
This week, contributor Crystal Dilworth finds out how exactly it has being used to help children with epilepsy and talks to families being labelled 'marijuana refugees' because they have uprooted their lives in order to get treatment for their children.
Also on this episode, we meet Jason Koger, who lives in small-town Kentucky and Katie Walker who spends her time in rigorous training for the 2016 Paralympic Games in Brazil.
The two lead very different lives, but have a powerful factor in common. Both Jason and Katie wear high-tech prosthetic hands to help them live actively and independently.
Contributor Phil Torres takes a close look at how these amazing bionic arms work, as he goes hunting on a quad bike with Jason; and then meets up with Katie for a run and a bit of baseball.
TechKnow can be seen each week at the following times GMT: Friday: 1930; Saturday: 1430; Sunday: 0430; Monday: 1630.
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Source: Al Jazeera