From Martin Savage
The artwork accompanying your article on aerogels describes them as “solids lighter than air”, but this is not borne out by the text. If an aerogel or nanofoam-type material could be made into a spherical shell, capable of supporting an airtight covering against a pressure of one atmosphere, you would have the “holy grail” of lighter-than-air vehicles: a lifting body capable of containing a vacuum without excessive structural weight.
Jomtien, Thailand
