Part of being an entrepreneur in the 21st Century is knowing how to work social media. For some, it can even lead to a lucrative career that lets them travel the world, or even find a livelihood by live-streaming daily tasks like shucking shellfish.
But some people are using the internet's reach to promote science education - and a young Yemeni man has found close to 20 million people who are willing to watch and listen.
Have a look at the video above to see how science enthusiast Hashem Al-Ghaili became a media consultant and public speaker by uploading short videos of his own onto Faccebook.
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