Aviation
Three observations about Flight 191, the Challenger disaster and what really makes an airplane ride feel bumpy.
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Three observations about Flight 191, the Challenger disaster and what really makes an airplane ride feel bumpy.
Ice, antioxidants, coffee, vaccines and dizziness: several health thoughts from Don’s journals.
A practical note about using hydrogen peroxide on blood-stained fabric.
A short thought about Thomas Edison’s formula for invention and the possibility of free energy.
Does exploring the cosmos benefit humanity—and is winning the race enough reason to go?