Astronomical Constants from NASA Astronomical/space constants and equations. http://www.ksc.nasa.gov/facts/faq04.html

RefScout A weekly, scientific reference mailing service. Screens databases covering life and medical sciences for the key words or the combination of key words specified and will automatically update with any abstract that has come up during the last seven days. Free service. http://www.refscout.com/

The Constants and Equations Pages Expanding reference resource for science, math and astronomy http://www.tcaep.co.uk/

GrayLIT Network Searchable database for reports that are generated by federally funded projects. http://www.osti.gov/graylit/

EquationSheet.com Searchable directory, arranged by field, of equations, constants, symbols and SI units. Also features LaTEX utilities, software links. http://www.equationsheet.com/

Physics and Science Reference by PhysLINK.com Includes physical constants, online unit conversions, periodic table of elements, exact time, fundamental physical formulae and equations. http://www.physlink.com/Reference/Index.cfm

World of Plants at Enid A. Haupt Conservatory The 19th-century building was completely reconstructed in the 1990s. Eleven exhibition galleries provide a journey around the world, with encyclopedic collections of tropical, subtropical, and desert plants. Exhibitions also include stunning collections of palms, ferns, cycads, and aloes. Featuring more than 3,000 specimens, World of Plants is displayed in biomes re-creating natural habitats that present a strong and coherent storyline. Located at the New York Botanical Garden. http://www.nybg.org/events/worldpl.html