Nature has come up with many ways to increase populations. Learn more about the weird ways organisms reproduce at HowStuffWorks.
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More Great Links
- "Asian Elephants Frequently Asked Questions." Smithsonian National Zoological Park. (3/3/2010) http://nationalzoo.si.edu/Animals/AsianElephants/elephantfaq.cfm
- "Baby dolphins never sleep." Reuters. June 30, 2005. (3/3/2010) http://www.abc.net.au/science/news/enviro/EnviroRepublish_1403878.htm
- Bäcker, Alex. "Evolution of Sleep." California Institute of Technology. (3/3/2010) http://www.its.caltech.edu/~alex/Evolution%20of%20Sleep%20Lecture.htm
- Biello, David. "Fruit Flies Reveal Sleep Secrets." Scientific American. Sept. 21, 2006. (3/3/2010) http://www.scientificamerican.com/article.cfm?id=fruit-flies-reveal-sleep
- Choi, Charles. "New Theory Questions Why We Sleep." Live Science. Aug. 25, 2009. (3/3/2010) http://www.scientificamerican.com/article.cfm?id=what-do-we-know-about-the-1997-09-15
- "DNA of sleep?" Science Daily. June 24, 2009. (3/3/2010) http://www.sciencedaily.com/releases/2009/06/090624093647.htm
- "Dolphins Keep an Eye Out While Sleeping." Live Science. May 1, 2009. (3/3/2010) http://www.livescience.com/animals/090501-dolphins-vigilance.html
- "Ever wondered why horses sleep standing up?" Washington Post. July 14, 2008. (3/3/2010) http://www.washingtonpost.com/wp-dyn/content/article/2008/07/13/AR2008071301635.html
- Graham, Sarah. "Songbirds Can 'Stash' Sleep during Migrations." Scientific America. July 13, 2004. (3/3/2010) http://www.scientificamerican.com/article.cfm?id=songbirds-can-stash-sleep
- Mahan, Rachel. "Bird Naps: How Migratory Flyers Catch Up on Sleep." Scientific American. April 2009. (3/3/2010) http://www.scientificamerican.com/article.cfm?id=napping-is-for-the-birds
- Marshall, Jessica. "To Sleep, Perchance to Dream." Smithsonian National Zoological Park. December 2007. (3/3/2010) http://nationalzoo.si.edu/Publications/ZooGoer/2007/6/To_Sleep_Perchance_to_Dream.cfm
- Mascetti, Gian et al. " Monocular-unihemispheric sleep and visual discrimination learning in the domestic chick." Department of General Psychology, University of Padova. 2007. (3/3/2010) http://cat.inist.fr/?aModele=afficheN&cpsidt=18409138
- Meadows, Robin. "A Neck Up on the Competition." Smithsonian National Zoological Park. August 1996. (3/3/2010) http://nationalzoo.si.edu/Publications/ZooGoer/1996/4/neckuponcompetition.cfm
- "The Characteristics of Sleep." Division of Sleep Medicine at Harvard Medical School. Dec. 18, 2007. (3/3/2010) http://healthysleep.med.harvard.edu/healthy/science/what/characteristics
- Tobler, Irene. "What do we know about the evolution of sleep--when it arose and why? Bacteria surely don't sleep, do they?" Scientific American. Sept. 15, 1997. (3/3/2010)http://www.scientificamerican.com/article.cfm?id=what-do-we-know-about-the-1997-09-15
- Van Oostendorp, Kyle. "Experimental analysis of sleep behavior in rana sphenocephala; Southern Leopard Frog." Washington College. Oct. 20, 2009. http://dspace.nitle.org/handle/10090/10732
- Viegas, Jennifer. "Top 20 Animal Sleepers and Why We Sleep." Discovery News. Aug. 21, 2009. (3/3/2010) http://news.discovery.com/animals/top-20-animal-sleepers-and-why-we-sleep.html
- White, Margaret. "The Evolution of Sleep." California State University Fullerton. (3/3/2010) http://psych.fullerton.edu/mwhite/473pdf/473%20Evolution%20of%20Sleep.pdf
- "Why do we Sleep? Scientists are Still Trying to Find Out." NatGeo News Watch. Aug. 26, 2009. (3/3/2010) http://blogs.nationalgeographic.com/blogs/news/chiefeditor/2009/08/why-we-sleep-is-a-mystery.html