Free, Open Source Textbooks Shaking Up Higher Education

A new type of textbook is threatening to disrupt a $4.5 billion industry that has so far avoided the media upheavals experienced in music, movies and trade publications. Open-source textbooks, free for students to use and for professors to modify, are being developed by more companies and adopted in more classrooms.

via Free Open

What the Curiosity Rover Can Teach Us About Mars — And Earth

Communicating with a Mars probe can be a little like talking to the dead. Depending upon how far apart Mars and Earth are at any given moment, it will take anywhere from 4 to 20 minutes for a light-speed radio signal to traverse the distance. What’s breaking news or an imminent danger when the spacecraft sends out its signal can be …

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