UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                   FORM 8-K/A

                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (date of earliest event reported):    February 24, 2006

                      BIOFORCE NANOSCIENCES HOLDINGS, INC.
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             (Exact name of registrant as specified in its charter)

           Nevada                    000-51074                  76-3078125
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(State or other jurisdiction        (Commission                (IRS Employer
      of incorporation)             File Number)             Identification No.)

              1615 Golden Aspen Drive, Suite 101, Ames, Iowa 50010
                    (Address of principal executive offices)

Registrant's telephone number, including area code: (515) 233-8333

                           SILVER RIVER VENTURES, INC.
           19 East 200 South, Suite #1080, Salt Lake City, Utah 84111
             (Former name and address, if changed since last report)

Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions:


[ ]  Written  communications  pursuant to Rule 425 under the  Securities Act (17
     CFR 230.425)

[ ]  Soliciting  material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
     240.14a-12)

[ ]  Pre-commencement   communications  pursuant  to  Rule  14d-2(b)  under  the
     Exchange Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement   communications  pursuant  to  Rule  13e-4(c)  under  the
     Exchange Act (17 CFR 240.13e-4(c))









                                   FORM 8-K/A

Explanatory Note

     On  February  24,  2006,   we  completed   the   acquisition   of  BioForce
Nanosciences,  Inc.,  a private  Delaware  corporation,  whereby  we merged  our
wholly-owned subsidiary, Silver River Acquisitions, Inc., with and into BioForce
with BioForce  being the  surviving  entity as our wholly owned  subsidiary.  In
connection  with the  acquisition,  we changed  our  corporate  name to BioForce
Nanosciences Holdings, Inc.


     On March 2, 2006,  we filed a current  report on Form 8-K  reporting  under
Item 2.01 the finalization of the acquisition of BioForce.  Also included in the
Form 8-K were the audited financial statements for BioForce  Nanosciences,  Inc.
for the years ended  December 31, 2004,  2003 and 2002 prepared by McGowen Hurst
Clark & Smith, P.C., certified public accountants,  and unaudited statements for
the interim  period ended  October 31, 2005.  Because the firm of McGowen  Hurst
Clark & Smith was not  registered  with the PCAOB,  the financial  statements of
BioForce Nanosciences,  Inc. for the years ended December 31, 2005 and 2004 have
been  reaudited  by  Chisholm,   Bierwolf  &  Nilson,   LLC,   certified  public
accountants,  and said  financial  statements  are included  herewith as Exhibit
99.3. On April 28, 2006, Chisholm, Bierwolf & Nilson replaced Moore & Associates
as the certifying accountants for BioForce Nanosciences Holdings, Inc. Following
the reaudit,  we have restated our financial  statements as of December 31, 2005
and March 31,  2006 and for the  three-month  periods  ended  March 31, 2005 and
2006.  We are filing an  amendment to our Form 10-QSB for the period ended March
31, 2006 to reflect this  restatement  and are  including in this Form 8-K/A the
restated financial statements of our subsidiary,  BioForce  Nanosciences,  Inc.,
for the years ended December 31, 2005 and 2004.


Section 9 - Financial Statements and Exhibits

Item 9.01      Financial Statements and Exhibits

     (a) Financial Statements of BioForce Nanosciences, Inc. (Restated)

               See Exhibits and 99.3

     (b) Pro Forma Financial Information

               See Exhibit 99.2

     (c) Exhibits

Exhibit Number                                   Description

          2.1(1)    Agreement  and Plan of Merger  with  BioForce  Nanosciences,
                    Inc. and Silver River Acquisitions, Inc. and Addendums

         21.1(1)    Subsidiaries

         99.1(1)    Audited financial statements for BioForce Nanosciences, Inc.
                    for the years ended  December 31, 2004,  2003 and 2002,  and
                    unaudited  statements  for the interim  period ended October
                    31, 2005

         99.2(1)    Unaudited pro forma combined financial  statements of Silver
                    River  Ventures,  Inc.  (now know as  BioForce  Nanosciences
                    Holdings, Inc.) and BioForce Nanosciences, Inc.

         99.3       Audited financial statements for BioForce Nanosciences, Inc.
                    for the years ended  December 31, 2005 and 2004  prepared by
                    Chisholm, Bierwolf & Nilson (Restated)
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         (1)        Included as exhibit to Form 8-K filed March 2, 2006.


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                                   SIGNATURES


     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                     BioForce Nanosciences Holdings, Inc.



Date:  November 13, 2006              By:     S/ ERIC HENDERSON
                                        ----------------------------------------
                                             Eric Henderson, Ph.D.
                                             Chief Executive Officer




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