Canadian Astronaut, back on Earth after 3 spaceflights. For events and media, please write to firstname.lastname@example.org.
I love pictures from space. Especially of Mars. (autumn sand dunes in a southern highlands crater) @NASA details:
This ancient glacier retreated by 23 km since 1990, and broke off in the record heat this summer. Now melting in the ocean. The world is getting @esaotter .
To Boldly Go What's more exciting than a new toilet? A new SPACE toilet. @NASA
Uplift - this athlete carried a disabled biology student named Eleftheria to the top of Mount Olympus, her dream. Well done, Marios. You are an Olympian. @MariosGiannakou
A clear way to watch the Earth's temperature changes over the past 137 years. (from historic & data, via )
Ashes to ashes, dust to stardust. Your brilliance inspired us all. Goodbye Starman.
In case you're wondering what landing on an aircraft carrier looks like. Imagine it at night in bad weather. BZ.
Genius is so fine and rare. Goodbye Professor Hawking. You inspired and taught us all.
Mental health affects us all. Bell gives 5¢ to mental health programs every time you Tweet #BellLetsTalk . They've donated $80 mill. Thanks!
Tonight this woman returns from space, the all-time US record-holder. Commander Peggy Whitson PhD, you rock. Safe landing, !
Leonard, you lived long and prospered, and were an inspiration to me and to millions. Rest in peace.