A climate scientist’s legal win just got flipped on its head

Michael Mann, the climate scientist famous for his “hockey stick” graph, won a $1 million defamation case — but a judge has now slashed the award, sanctioned his lawyers, and ordered him to pay over $500,000 in legal fees.

Dino Grandoni reports for The Washington Post.


In short:

  • Mann initially won a defamation case against two conservative commentators who falsely accused him of academic fraud, comparing his climate research to child molestation.
  • A judge has now ruled that Mann’s lawyers misrepresented financial damages, reducing his award and ordering him to pay legal costs for National Review, one of the publishers of the defamatory content.
  • Mann’s legal team plans to appeal, arguing the original defamation ruling remains valid and that the court made significant legal and factual errors.

Key quote:

[Mann] “believes that the court committed errors of fact and law and will pursue these matters further.”

— Peter J. Fontaine, one of Michael Mann’s attorneys

Why this matters:

Mann’s case is a stunning reversal in a proceeding that was supposed to be a victory for scientists fighting back against disinformation. While the original ruling confirmed he was defamed, the reversal raises concerns about how courts handle cases involving scientists facing politically motivated attacks and could have a chilling effect on researchers speaking out against disinformation.

Read more:

Climate scientist Michael Mann takes his critics to court

The sign upon entering Yellowstone National Park with hills int he background

Trump victorious in legal battle to erase climate change and slavery signs from national parks

Donald Trump wants to “restore truth and sanity” to US history by removing signage on climate change, slavery and other topics.
Gas-fired power plant in Berlin, smokestack emitting smoke

New power plants for data centers would significantly increase Pennsylvania’s climate pollution

A new report studied potential emissions from seven planned gas-fired plants that would fuel data centers in Pennsylvania. The industry says it’s investing in clean technology.
An outdoor worker laying asphalt

Extreme heat is not an equal-opportunity killer

Power shutoffs, no A/C, outdoor work. In a nation built on inequality, extreme heat's victims are exactly who you'd expect.
High voltage transmission towers against a setting or rising sun

Why heat waves heighten the risk of blackouts

When extreme heat hits, people turn to AC, but what if the grid fails? From France to the US, heat waves are pushing power systems to the limit, raising blackout risks and energy prices when electricity is needed most.
Bow of a moored boat against a brilliant red-orange sunset over the ocean

The Pacific Ocean is running a fever. Why that’s an ominous sign

A marine heat wave covering an area eight times the size of the United States could soon fuel serious storms and extreme heat.
Woman shielding her eyes from sun with summer heat wave in the city background.
Credit: Tom Wang/BigStock Photo ID: 406607645

Without climate change, U.S. heat wave called ‘virtually impossible’

Scientists have said the conditions are the result of a climate that is “fundamentally different” from the time before fossil fuel use started rapidly warming the world.
A dhow, a traditional sailing vessel for the region, sailing past a larger ship near the port of Zanzibar, Tanzania.

East Africa’s coastal communities adapt to climate change and declining fisheries

Across East Africa’s coastline, climate change and industrial fishing are threatening the livelihoods of millions who depend on the ocean.
From our Newsroom
Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

One facility has emitted cancer-causing chemicals into waterways at levels up to 520% higher than legal limits.

Regulators are underestimating health impacts from air pollution: Study

Regulators are underestimating health impacts from air pollution: Study

"The reality is, we are not exposed to one chemical at a time.”

Pennsylvania governor Josh Shapiro speaks with the state flag and American flag behind him.

Two years into his term, has Gov. Shapiro kept his promises to regulate Pennsylvania’s fracking industry?

A new report assesses the administration’s progress and makes new recommendations

silhouette of people holding hands by a lake at sunset

An open letter from EPA staff to the American public

“We cannot stand by and allow this to happen. We need to hold this administration accountable.”

wildfire retardants being sprayed by plane

New evidence links heavy metal pollution with wildfire retardants

“The chemical black box” that blankets wildfire-impacted areas is increasingly under scrutiny.

Stay informed: sign up for The Daily Climate newsletter
Top news on climate impacts, solutions, politics, drivers. Delivered to your inbox week days.