Wikipedia's first sentence called it “israeli marine biologist”. Today it says “marine biologist and environmental activist”.
Measured, not asserted. Every count, date and revision on this page was taken from Wikipedia's own history and checked against the live article. The words quoted are theirs.
Machine-checked against the full current article on 2026-08-03.
We saved snapshots of this article over twenty years; you are reading the 2020 one. Red dashes: removed from Wikipedia since.Pale dots: rewritten; the numbered note shows what it says now.Red text: written in or rewritten since the previous snapshot.1 tap a number or a side note to jump between them
The opening as it read in 2020
Benjamin Kahn (born 1955) is an Israeli marine biologist and environmental activist. His work includes ecological improvements of the Red Sea reef , where damage began in 1997 with the advent of fish farming , resulting from tons of waste into the reef. Kahn appeared on Time Magazine 's list of " Heroes of the Environment " October 2007. Kahn's work has been done largely through Zalul Environmental Association , an environmental non-profit organization founded by his billionaire philanthropist father and dedicated to protecting the seas and rivers in Israel . Kahn serves as chairman of Zalul. Kahn is the founder and CEO of Atlantium Technologies, a water purification technology firm established in 2005 that developed a hydro-optic ultraviolet technology used as a non-chemical means to control biofouling . In 2017, Atlantium was chosen to install this system to prevent the clogging of piping at the Hoover Dam by quagga mussels . Kahn also serves as President of Coral World International Ltd., an operator of marine parks that specializes in ecologically-friendly tropical life systems in symbiotic environments.
This is Wikipedia's own text, saved in our repository. Their copy of it is revision 963958428.
The opening as it stood in 2010
Benjamin Kahn is an Israeli marine biologist . He has been fighting for the survival of the Red Sea reef , which began dying when giant fish farms were built in 1997, and the cages were spewing tons of uneaten food and excrement onto the reef. Kahn appeared on Time Magazine 's list of " Heroes of the Environment " October 2007. Kahn's work has been done largely through Zalul Environmental Association, an environmental non-profit organization dedicated to protecting the seas and rivers in Israel .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 323077632.
The opening as it stood in 2015
Benjamin Kahn (born 1955) is an Israeli marine biologist . He has been fighting for the survival of the Red Sea reef , which began dying when giant fish farms were built in 1997, and the cages were spewing tons of uneaten food and excrement onto the reef. Kahn appeared on Time Magazine 's list of " Heroes of the Environment " October 2007. Kahn's work has been done largely through Zalul Environmental Association, an environmental non-profit organization dedicated to protecting the seas and rivers in Israel .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 578443470.
The opening as it stood on October 6, 2023
Israeli biologist Benjamin Kahn (born 1955) is an Israeli marine biologist and environmental activist. His work includes ecological improvements of the Red Sea reef, where damage began in 1997 with the advent of fish farming , resulting from tons of waste into the reef. Kahn appeared on Time magazine's list of " Heroes of the Environment " October 2007. Kahn's work has been done largely through Zalul Environmental Association , an environmental non-profit organization founded by his billionaire father and dedicated to protecting the seas and rivers in Israel. Kahn serves as chairman of Zalul. Kahn is the founder and CEO of Atlantium Technologies, a water purification technology firm established in 2005 that developed a hydro-optic ultraviolet technology used as a non-chemical means to control biofouling . In 2017, Atlantium was chosen to install this system to prevent the clogging of piping at the Hoover Dam by quagga mussels . Kahn is the president of Coral World International Ltd, an operator of marine parks that specializes in ecologically-friendly tropical life systems in symbiotic environments. The Times of Israel . 14 September 2017 .The Times of Israel .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1096836839.
The opening as it stood in 2025
Israeli biologist Benjamin Kahn ( Hebrew : בנימין קאהן ; born 1955) is an Israeli marine biologist and environmental activist. His work includes ecological improvements of the Red Sea reef, where damage began in 1997 with the advent of fish farming , resulting from tons of waste into the reef. Kahn appeared on Time magazine's list of " Heroes of the Environment " October 2007. Kahn's work has been done largely through Zalul Environmental Association , an environmental non-profit organization founded by his billionaire father and dedicated to protecting the seas and rivers in Israel. Kahn serves as chairman of Zalul. Kahn is the founder and CEO of Atlantium Technologies, a water purification technology firm established in 2005 that developed a hydro-optic ultraviolet technology used as a non-chemical means to control biofouling . In 2017, Atlantium was chosen to install this system to prevent the clogging of piping at the Hoover Dam by quagga mussels . Kahn is the president of Coral World International Ltd, an operator of marine parks that specializes in ecologically-friendly tropical life systems in symbiotic environments. The Times of Israel . 14 September 2017 . The Times of Israel .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1286429908. This is our newest snapshot; the live article may have moved again since.
Today
Wikipedia's first sentence called it “israeli marine biologist”. Today it says “marine biologist and environmental activist”. Read the current article and compare.
2010
2015
2020
Oct '23
2025
Counts in the opening at each snapshot. Green: the word gained ground. Red: it was cut. Grey: no change.
What Wikipedia says this is
Every article opens by defining its subject. This one was redefined since 2010, and today's defining sentence is their current revision.
Then
israeli marine biologist
Now
marine biologist and environmental activist
Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.