(@BillGates screen grab)

“Hello world,” Bill Gates said when he joined Twitter and tweeted for the first time on Jan. 19, 2010. Ten years later, the billionaire philanthropist and Microsoft co-founder has had plenty more to say — and Thursday he shared some of his favorite tweets from that time period.

In a video directed at his nearly 50 million followers, Gates ticked off seven tweets, including a “mind-blowing fact” (about how much cement China uses) and “the most beautiful chart in the world” (about the decline in child deaths).

A tweet featuring President Barack Obama made the cut. So did the Ice Bucket Challenge. And true to his mission of highlighting the causes near and dear to the Bill & Melinda Gates Foundation, Gates shared his love for a vaccine tweet, a mosquito tweet and, of course, a toilet tweet: “There are few things I love more than talking about toilets.”

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