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<!DOCTYPE ArticleSet PUBLIC "-//NLM//DTD PubMed 2.0//EN" "http://www.ncbi.nlm.nih.gov:80/entrez/query/static/PubMed.dtd">
<ArticleSet>
<Article>
<Journal>
<PublisherName>Science and Education Publishing</PublisherName>
<JournalTitle>International Journal of Physics</JournalTitle>
<Issn>2333-4886</Issn>
<Volume>2</Volume>
<Issue>6</Issue>
<PubDate PubStatus="epublish">
<Year>2014</Year>
<Month>11</Month>
<Day>23</Day>
</PubDate>
</Journal>
<ArticleTitle>Carl Sagan's Conjecture of a Message in π</ArticleTitle>
<FirstPage>264</FirstPage>
<LastPage>266</LastPage>
<Language>EN</Language>
<AuthorList>
<Author>
<FirstName>Arne</FirstName>
<LastName>Bergstrom</LastName>
<Affiliation>B&amp;E Scientific Ltd, Seaford BN25 4PA, United Kingdom</Affiliation>
</Author>

</AuthorList>
<ArticleIdList>
<ArticleId IdType="pii">IJP2014269</ArticleId>
<ArticleId IdType="doi">10.12691/ijp-2-6-9</ArticleId>
</ArticleIdList>
<History>
<PubDate PubStatus="received">
<Year>2014</Year>
<Month>11</Month>
<Day>04</Day>
</PubDate>
<PubDate PubStatus="revised">
<Year>2014</Year>
<Month>11</Month>
<Day>17</Day>
</PubDate>
<PubDate PubStatus="accepted">
<Year>2014</Year>
<Month>11</Month>
<Day>23</Day>
</PubDate>
</History>
<Abstract>In his novel Contact, the astrophysicist Carl Sagan hypothesized an alien message to be buried somewhere deep inside the numerical representation of the transcendental number . The present article looks for markers that might possibly support such a hypothesis, and surprisingly finds a sequence of seven successive zeros (actually seven successive nines rounded off) at a depth of 3256 digits into the representation of 2 in the special case of base ten. Finding such a sequence of zeros within the first 1000 digits has a probability of 1 in 10000. No such occurrences happen even remotely for 2 at any base other than ten, nor even remotely in corresponding representations of other common transcendental numbers, such as e, which appear in physical applications. In , this occurrence thus also remarkably appears at a depth that is a multiple of the same power of two as bits in a computer byte, which thus makes it even more enigmatic. Still, these effects are most probably just numerical coincidences without physical relevance.</Abstract>
</Article>
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