Signs of life on Mars? These are the tracks of NASA’s Curiosity rover exploring the Martian landscape. NASA/JPL-Caltech/MSSS

Our long fascination with the journey to Mars

Mars has long captured our imagination, from claims of canals to Martian attacks and now our latest NASA exploration to look inside the red planet.
If you went to Mars, you’d need to be able to survive an extremely punishing environment. This picture, taken by NASA’s Mars Exploration Rover Opportunity, gives you an idea. NASA/JPL-Caltech/Cornell Univ./Arizona State Univ.

Curious Kids: What are some of the challenges to Mars travel?

I've worked with NASA’s Mars Exploration Rover Project for 16 years. If you got yourself a ticket to Mars, here's how I'd advise you to prepare. And by the way, any mistake could kill you.
S'gaw Karen girls of Khun Yuam District, Mae Hong Son Province, Thailand. Takeaway

Immigration to US Westernizes Asian guts

When immigrants come to the US, it isn't just the people who assimilate. The microbes in their gut also become Westernized after living here. This may predispose them to diseases like obesity.
In this Oct. 10, 2018, photo, a man walks past a boat swept ashore by a tsunami in Wani village on the outskirt of Palu, Central Sulawesi, Indonesia. The 7.5 magnitude earthquake on Sept. 28, triggered a tsunami and mudslides. (AP Photo/Dita Alangkara, File)

Why some earthquakes are so deadly

Last month's earthquake in Sulawesi, Indonesia was large, but not huge. It was the aftereffects that made it so devastating.

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