of Katy Perry
Google launched Gmail -- the world's most-used email service -- 10 years ago. Here's how it's changed email as we know it.
Ten years ago Google launched Gmail, a free web-based email service (at first invite-only) that has grown into the world's most-used. Here's a look at 10 innovations Gmail has led since its April 1, 2004, launch.
Aero Icarus/Wikimedia Commons
The first transcontinental telegraph message is sent, Harry Houdini gives his last performance, the United Nations is born, Jackie Robinson dies, and the Concorde makes its last commercial flight, all on this day.
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