Science & Health

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?