Answer:
On February 19, 2007, the first version of the Tumblr microblogging service was founded by David Karp and Marco Arment. They launched a more complete version in April 2007.
Step-by-step explanation:
More than 100 million blogs will be online in 2007. The count continues to double every 5.5 months. About half of the blogs created are ever maintained after being created. And fewer than 15% of blogs are updated at least once a week. (Technorati)
….Yeah, it’s still a blog. But it’s a new philosophy. It’s free of noise, requirements, and commitments. And it’s finally here.
let me know if that is good enough