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published by the Discover
This article from Discover magazine overviews twenty ways the planet could experience mass extinction or worse. Examples include asteroid impact, alien invasion, and gamma-ray bursts.
Subjects Levels Resource Types
- Solar System
= Asteroids
- Stars
= Gamma-ray Bursts
- Informal Education
- Reference Material
= Article
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- Learners
- text/html
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Additional Information
Physics To Go This resource was a Physics To Go feature from October 16, 2010 until November 1, 2010. View the feature here!

Access Rights: Free access
Restriction: © 2000 Discover
Has a copyright or other licensing restriction.
Keyword: asteroids
Record Creator: Metadata instance created October 18, 2010 by Raina Khatri
Record Updated: Oct 18, 2010 by Ed Lee
Last Update
when Cataloged:
October 1, 2000
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
(Discover, Boone, 2000), WWW Document, (
20 Ways the World Could End, (Discover, Boone, 2000), <>.
APA Format
20 Ways the World Could End. (2000, October 1). Retrieved July 29, 2016, from Discover:
Chicago Format
Discover. 20 Ways the World Could End. Boone: Discover, October 1, 2000. (accessed 29 July 2016).
MLA Format
20 Ways the World Could End. Boone: Discover, 2000. 1 Oct. 2000. 29 July 2016 <>.
BibTeX Export Format
@misc{ Title = {20 Ways the World Could End}, Publisher = {Discover}, Volume = {2016}, Number = {29 July 2016}, Month = {October 1, 2000}, Year = {2000} }
Refer Export Format

%T 20 Ways the World Could End
%D October 1, 2000
%I Discover
%C Boone
%O text/html

EndNote Export Format

%0 Electronic Source
%D October 1, 2000
%T 20 Ways the World Could End
%I Discover
%V 2016
%N 29 July 2016
%8 October 1, 2000
%9 text/html

Disclaimer: ComPADRE offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure. Please refer to the style manuals in the Citation Source Information area for clarifications.

Citation Source Information

The AIP Style presented is based on information from the AIP Style Manual.

The APA Style presented is based on information from APA Electronic References.

The Chicago Style presented is based on information from Examples of Chicago-Style Documentation.

The MLA Style presented is based on information from the MLA FAQ.

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