Thomson Acquires Prous Science

Thomson Acquires Prous Science

September 27, 2007

Acquisition to Expand Thomson Scientific's Market-leading
Portfolio of Chemistry and Drug Discovery Information
Solutions

    STAMFORD, Conn., Sept. 27 /Xinhua-PRNewswire / -- 

    The Thomson Corporation (NYSE: TOC; TSX: TOC), a
leading provider of information solutions to business and
professional customers worldwide, today announced that it
has acquired Prous Science, a global leader in the
provision of life sciences information solutions. Prous
Science will become part of Thomson Scientific.  Financial
terms of the transaction were not disclosed. 

    Scientists worldwide rely on Prous Science information
solutions to enhance knowledge-based drug discovery and
development. Its well-known Prous Science Integrity(R)
portal provides access to more than 265,000 compounds with
demonstrated biological activity and close to 100,000
patent family records. Prous Science has worked closely
with its customers and partners to develop this highly
differentiated information offering tailored to the needs
of end user scientists.  

    In addition, Prous Science has developed strong
relationships with key global medical associations and
Centers of Excellence to maximize the reach of medical
knowledge to specialists worldwide.

    "Prous Science has built a strong global brand on
its flagship solutions which have been built by scientists
for scientists," said Vin Caraher, President and CEO,
Thomson Scientific. "This acquisition really
complements our Pharma & Biotechnology workflow
solution offerings. We look forward to working closely with
the Prous Science management team to maximize synergies and
add value for our customers." 

    "Today's announcement signals an excellent
opportunity to accelerate our product development and
innovation plan in the drug discovery space. By combining
the financial strength, creativity and technology of
Thomson with Prous Science, we will further drive
innovations that help scientists find better solutions to
their specific problems while fostering the emergence of
new ideas," said Dr. J.R. Prous, President and CEO,
Prous Science.

    Headquartered in Barcelona, Spain, where the company's
operations will remain, Prous Science serves key strategic
geographic areas including Europe, Japan, North America and
Latin America. Founded in 1958 by current President and CEO
Dr. J.R. Prous, the company has more than 180 employees.
Prous Science management and employees will become part of
the Pharmaceutical/Chemical business unit within Thomson
Scientific.

    "Thomson Scientific, through its core products,
including Thomson Pharma, IDDB, Derwent World Patents Index
and Web of Science, has particular strengths in patent,
business intelligence and investigational drug
information," said Jon Brett-Harris, Executive Vice
President of Pharma/Chem Markets, Thomson Scientific.
"The Prous Integrity platform complements our
portfolio offering by providing unparalleled drug discovery
content and unique analytic functionality for chemists and
biologists."

    "Our strong background in the life sciences
coupled with Thomson Scientific's expertise in intellectual
property and competitive intelligence equal a powerful value
proposition for customers of both companies," added Dr.
Josep Prous Jr., Executive Vice President, Prous Science.

    The Thomson Corporation

    The Thomson Corporation ( http://www.thomson.com ) is a
global leader in providing essential electronic workflow
solutions to business and professional customers. With
operational headquarters in Stamford, Conn., Thomson
provides value-added information, software tools and
applications to professionals in the fields of law, tax,
accounting, financial services, scientific research and
healthcare. The Corporation's common shares are listed on
the New York and Toronto stock exchanges (NYSE: TOC; TSX:
TOC). 

    Thomson Scientific is a business of The Thomson
Corporation. Its information solutions assist professionals
at every stage of research and development-from discovery to
analysis to product development and distribution. Thomson
Scientific information solutions can be found at
http://www.scientific.thomson.com .

    About Prous Science

    For more than 40 years, Prous Science has been a
trusted source of information on which science depends to
discover safer and more effective medicines. The company's
products have evolved through the years from print journals
to sophisticated electronic products incorporating the
latest advances in IT. The company has complemented its
Drug discovery solutions with a series of key partnerships
to widen the dissemination of Medical Education worldwide
by fostering relationships with key Medical Institutions
and centers of excellence worldwide. For more information
about Prous Science, visit http://www.prous.com .

    This news release includes forward-looking statements
which are based on certain assumptions and reflect The
Thomson Corporation's current expectations. All
forward-looking statements in this news release are subject
to a number of risks and uncertainties that could cause
actual results or events to differ materially from current
expectations. Some of the factors that could cause actual
results to differ materially from current expectations
include risks related to Thomson Scientific's ability to
successfully integrate Prous Science, and actions of
Thomson Scientific's competitors. Additional factors are
discussed in the Corporation's materials filed with the
securities regulatory authorities in Canada and the United
States from time to time, including the Corporation's
latest annual information form, which is contained in its
most recently filed annual report on Form 40-F. The
Corporation disclaims any intention or obligation to update
or revise any forward-looking statements, whether as a
result of new information, future events or otherwise,
other than as required by law.


    For more information, please contact:

    Thomson Scientific

     Media:
     Allison Hagan
     Phone: [phone]
     EMail: [e-mail]

     Investors:
     Frank J. Golden, Vice President, Investor Relations
     Phone: [phone]
     Email: [e-mail] 

     Website:  http://www.thomson.com
               http://www.prous.com
               http://www.scientific.thomson.com