Humans accidentally canceled the next ice age — but it’s no reason to celebrate, scientists say

illuminem summarises for you the essential news of the day, reviewed by our editorial team. Read the full piece on CNN or enjoy below:

🗞️ Driving the news: Human-driven climate change may have interrupted the early stages of Earth's next ice age, according to a new study published in Science
• Researchers found that the Barnes Ice Cap in Canada's Arctic, a remnant of the Laurentide Ice Sheet, began expanding around 2,000 years ago before abruptly reversing course in the 1960s as greenhouse gas emissions intensified.

🔭 The context: Scientists reconstructed the ice cap's history using ancient mosses preserved beneath the ice and radioactive isotopes in nearby rocks
• The evidence suggests the ice reached its minimum extent roughly 3,000 years ago before beginning to grow again
• However, the interpretation remains contested: other climate models suggest the next major glaciation would not have occurred for approximately 50,000 years, even without global warming

🌍 Why it matters for the planet: The research highlights how greenhouse gas emissions can override natural climate mechanisms and fundamentally alter Earth's long-term trajectory
• Rather than celebrating the interruption of a potential ice age, scientists warn that it demonstrates the extraordinary scale of humanity's influence on the climate system

⏭️ What’s next: Researchers say comparisons with other advancing glaciers could help clarify whether the Barnes Ice Cap's expansion truly marked the beginning of a new glacial cycle. The findings also offer a new perspective on 1970s predictions of global cooling, while underscoring that delaying natural glaciation does not make anthropogenic warming beneficial.

💬 One quote: “We’ve probably put off any chance of any other future glaciation for a very, very long time.” - Nicolás Young, study co-author and geochemist at Columbia University

📈 One stat: 50,000 years: The approximate timeframe some climate models suggest before the next ice age would naturally begin, even without global warming

Subscribe to our free newsletters to never miss a beat in sustainability.

The world needs sustainability knowledge. At illuminem, no interest group or shareholder can influence our work. Thank you for supporting our mission to make high-quality and independent sustainability information free for all. Every contribution helps. Thank you for donating today.

___