January 31, 2017

January 30, 2017

Iceland Farm


Isolated farm. Iceland, 1985.

Photo by I. Peterson

January 29, 2017

Brick Shadows


Floor pattern, Academic Quadrangle. Rice University, Houston, Texas, 2008.

Photo by I. Peterson

January 28, 2017

Beach Palm


Waikiki beach. Honolulu, Hawaii, 1983.

Photo by I. Peterson

January 26, 2017

River Town


Town along Rhine River, near Frankfurt, Germany, 1985.

Photo by I. Peterson

January 25, 2017

Khachapuri Shop


Sign at khachapuri shop. Tbilisi, Georgia, 2012.

Photo by I. Peterson

January 24, 2017

Rooftops


Rooftop view from the Glasgow-London train, 1975.

Photo by I. Peterson

January 23, 2017

Light Waves


Pan American Health Organization, 23rd Street, NW, Washington, D.C., 2010.

Photo by I. Peterson

January 22, 2017

Block Forms


Rectangular-block sculpture, Wean Hall. Carnegie Mellon University, Pittsburgh, Pennsylvania, 2009.


Photos by I. Peterson

January 20, 2017

Monticello


Monticello. Charlottesville, Virginia, 2010.

Photo by I. Peterson

January 19, 2017

January 18, 2017

Cube Stack


Cubic display. Expo 67, Montreal, Quebec, 1967.

Photo by I. Peterson

January 17, 2017

Stump Growth


Lake MacDonald, Quebec, 2009.

Photo by I. Peterson

January 15, 2017

January 14, 2017

Coil Shadows


Student sculpture. Towson University, Towson, Maryland, 2012.

Photo by I. Peterson

January 13, 2017

Stone Triangle


Guennette by Michael Heizer. Massachusetts Institute of Technology, Cambridge, Massachusetts, 2009.

Photo by Ivars Peterson

January 12, 2017

4729494


Tessellation Tango (detail showing Archimedes' cattle problem number) by Linda Vanderkolk and Scott Frankenberger, Mathematical Sciences Research Center. Berkeley, California, 2011.


Photo by I. Peterson

January 11, 2017

House of Spires


Spire, Casa Terradas. Barcelona, Spain, 2007.


Photos by I. Peterson

January 10, 2017

January 9, 2017

Royal Poinciana


Royal Poinciana (Delonix regia). Nassau, The Bahamas, 1969.

Photo by I. Peterson

January 8, 2017

Shore Shells


Sydney Opera House, constructed from sections of a sphere. Sydney, Australia, 1979.


Photo by I. Peterson

January 7, 2017

Lamp Leaves


Ornate sconce, Battle Hall. University of Texas at Austin, Austin, Texas, 2009.

Photo by I. Peterson

January 6, 2017

Star Mandala


Painted mandala with an eight-pointed star. Homage to St. EOM's Pasaquan by Eddie Owens Martin, Folk Art Park, Atlanta, Georgia.

See also "Atlanta Mandala."

Photo by I. Peterson

January 5, 2017

Stairwell Light


Williams Performing Arts Center, Abilene Christian University, Abilene, Texas, 2010.

Photo by I. Peterson

January 4, 2017

January 3, 2017

Circle Patterns


Circular wall painting by Jason Woodside. Bethesda, Maryland, 2016.

Photo by I. Peterson

January 2, 2017

Heads or Tails


Heads or Tails by Frank Stella. Lobby, Tang Building, Massachusetts Institute of Technology, Cambridge, Massachusetts, 2009.

Photo by I. Peterson

January 1, 2017

2017


2017 is a prime number.

2017 is 11111100001 in binary.

2017 is a central polygonal number: a number of the form k(k + 1)/2 + 1, where k = 63 (A000124). It is the maximum number of pieces of a circular pizza that you can make with 63 straight cuts.

2017, (2017 + 1)/2 = 1009, and (2017 + 2)/3 = 673 are all primes (A036570).

2017 = 502 + 504 + 505 + 506 (the sum of four consecutive composite numbers) (A060329). 2017 is also the sum of eight consecutive composite numbers (A060333).

2017 is a generalized canyon prime (A183087).

2017 is a year with 53 Sundays, according to the Gregorian calendar (A242593).

2017 has been designated by the United Nations as the International Year of Sustainable Tourism for Development.