Museum’s 150-Year-Old Plankton Have Thicker Shells Than Their Modern Counterparts

By Theresa Machemer/

The H.M.S. Challenger spent just over three years in the late 1800s circumnavigating the globe and studying ocean life. Today, thousands of the specimens collected during the Challenger expedition reside at London’s Natural History Museum.

In a new study published in Scientific Reports, researchers at the museum compared plankton collected on the Challenger expedition to modern specimens. They found that on average, today’s plankton has thinner shells than those from 150 years ago—likely as a result of climate change.

The Challenger was a small warship before it was a research vessel. Fifteen of its 17 guns were removed before the mission to make more space on the ship, which was then decked out with rooms for photography, dissections, laboratories and a small library. The Challenger set off in December 1872 with thousands of bottles and boxes for holding specimens and 181 miles of rope to measure the ocean’s depth.

Throughout the journey, the crew would dredge the bottom of the ocean with a weighted net. The net brought up fish, mud and at least one shark. The six scientists aboard the ship documented everything they found, big and small.


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  1. Would that not work hand in hand with loss of rain forest to increase atmospheric carbon dioxide concentration?

  2. “Unraveling the Mysteries of Carbonic Acid” > ScienceDaily(.)com > June 23, 2015

    Carbonic acid is extremely weak acid and outside of laboratory test tubes has a half-life of 26 milliseconds. The oceans are at maximum saturation from over hundred thousand miles of volcanic rift zones to CO2 and there is NO net absorption from the atmosphere. Ocean acidification is another climaclownology FRAUD.

    “Volcanic CO2” by Timothy Casey > Geologist-1011(.)net

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