We're giving away a FREE signed copy of Emily Lakdawalla's new book, The Design and Engineering of Curiosity! Retweet for a chance to win, winner drawn at random August 17! While you wait, read an excerpt describing Curiosity's power supply: planetary.org/blogs/emily-la…

#FalconHeavy Wow! Hard to imagine topping the first one. And yet, here we are. Watched with my family. All but cheered - again! - when the boosters landed. So excited to see the central core standing tall. And even the fairings? Woot SpaceX!

Grats Panic for #playdate - I LOLed at “literally revolutionary.” If the product meets the quality I typically associate with Panic, this will be a hit.

Happy Moon Week! #Apollo50th Fifty years. It's time we got some permanent presence on the Moon.

For my fellow HTML jockeys: the ID of an element must be unique in the entire page.

Let's go, SpaceX and #LaunchAmerica - godspeed to Bob & Doug.

So excited to watch #LaunchAmerica today and see the safety rules in action. Storms today, stars tomorrow. Godspeed, Bob & Doug!

Dear Twitter - please get the blasted theme working right before mucking it up. Thank you.

Thanks for flying SpaceX

#SN5Hop150 for the win! Wow, that was a show.

I just heard from my publisher Penguin Random House 🐧🏠📚, that next Saturday 10/10 my e-book will be available for $1.99 for one day only. Sorry about the earlier confusion, I will double check and send a reminder and link a week from now for those interested. Have a great weekend!

Really enjoyed the thoughtful, overview-in-a-box Sustainability video, Apogee! Thank you for your thoughtful contribution. Enjoyable and informative.

Falcon Heavy, so exciting. I can't wait.

Did we get any imagery from the central core landing? Brendan Byrne NSF - NASASpaceflight.com Andrew/Pad 39A (parody)

#FalconHeavy A brilliant display, truly amazing. The thunderous roar, tearing the atmosphere. Another step, SpaceX! Cheers and many, many congratulations.

Panic Some context would be nice: macOS Coda 2

How to Make Simple Things Frustrating and Difficult: A Study In "User Experience" on Microsoft Feature Imitation and Maladaptive Interface - or - The One Microsoft Product That Wouldn't Suck: MS Vacuum Cleaner (Intelligent Debris Collection Apparatus for Home Carpets)