Video: How Twitter cashed in on the hashtag created by an outsider
Chris Messina, a Silicon Valley engineer, came up with the concept in 2007.

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‘Ananda’: An illuminating and diverse account of the deep roots of cannabis in Indian society
Bedtime social media has emotional effects that can disrupt sleep
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Canadian election: Why South Asians and Chinese immigrants have swung conservative
When a young India was struggling to define modern theatre, it found inspiration in its folk culture
‘The Book of Disappearance’: The dangerous ease with which colonial dispossession can become routine
‘A graceful, magnetic speaker’: How Susie Sorabji captivated US audiences in early 20th century