“Those experiments that cannot be justified on scientific grounds can be no more justified than the frivolous killing and torturing of animals. In fact they are even less capable of justification, since such experiments block more fruitful uses of scientific resources.”

The Atheist's Guide to Reality (2011)

Source: Even a stone can be a teacher (1985), p. 20

The Phantom 'Rickshaw http://whitewolf.newcastle.edu.au/words/authors/K/KiplingRudyard/prose/PhantomRickshaw/phantomrickshaw.html (1888).
Other works

letter http://darwin-online.org.uk/content/frameset?itemID=F2113&viewtype=text&pageseq=7 to E. Ray Lankester, quoted in his essay "Charles Robert Darwin" in C.D. Warner, editor, Library of the World's Best Literature: Ancient and Modern (R.S. Peale & J.A. Hill, New York, 1896) volume 2, pages 4835-4393, at page 4391
Other letters, notebooks, journal articles, recollected statements

Source: This Is How: Proven Aid in Overcoming Shyness, Molestation, Fatness, Spinsterhood, Grief, Disease, Lushery, Decrepitude & More. For Young and Old Alike.

12 September 1936, Advice to the pupils of the Bishop Cotton School, Simla, also quoted in Speeches and Statements of the Marquess of Linlithgow, p. 19

In Search of Memory (2006)

Edwards v. Aguillard, 482 U.S. 578 (1987) (dissenting) http://www.belcherfoundation.org/edwards_v_aguillard_dissent.htm
Has been misleadingly quoted without Scalia's statements attributing the assertions to witness testimony paragraphs earlier, "Before summarizing the testimony of Senator Keith and his supporters, I wish to make clear that I by no means intend to endorse its accuracy... Senator Keith and his witnesses testified essentially as set forth in the following numbered paragraphs:", as in Michael Stone, " Scalia Commencement Speech Supports Young Earth Creationism http://www.patheos.com/blogs/progressivesecularhumanist/2015/06/scalia-commencement-speech-supports-young-earth-creationism/" (), Progressive Secular Humanist, Patheos.
Misattributed

On energy supply and solar power