Member/Contributor to Cultural Institution

	Member and/or contributor	Contributor beyond membership (base member)
Member/contributor to one or more institutions (net)	86.1%	34.2%
Art museum	33.5%	8.1%
Natural history/science museum	66.3%	11.0%
Performance arts (Symphony orchestra/ballet/dance company, etc)	27.6%	13.4%
Zoo/aquarium/botanical garden	37.4%	8.1%
Other cultural institution	23.7%	16.1%
PBS/NPR membership	38.2%
Member/contributor to two or more institutions (net)	60.6%	18.1%
Member/contributor to three or more institutions (net)	38.1%	8.6%

Source: 2008 Ipsos Mendelsohn Natural History Subscriber Study. Indexes based on 2008 Mendelsohn Affluent Survey

Deciphering the link between nature and nurture

Raindrop pockmarks may provide clue to the density of Earth's atmosphere 2.7 billion years ago when the Sun was 30 percent dimmer than today.

The legacy of "Brian Tinsley's clever wife"

Tourists are only encouraging a dubious Vietnamese tradition.

Hear author Michio Kaku interviewed by Vittorio Maestro, Editor in Chief of Natural History. (MP3, 19 minutes)