Launching publicly in August 2006, Twitter has enjoyed a massive amount of growth in its four years of existence.

The microblogging service surpassed five billion tweets in October 2009, smashed past ten billion tweets in March of this year and tomorrow will surpass twenty billion tweets; a huge milestone for the San Francisco based company.

Tweet counting website Gigatweet predicts that the twenty billionth tweet will be posted around 07:30 PDT / 15:30 BST tomorrow and as always, we will do our best to grab the very tweet that breaks that barrier.

To put this in perspective, twenty billion tweets equates to every single living person on the earth tweeting nearly three tweets each. Massive.