Year in Review: The 10 Stories That Defined 2025
From breakthrough AI developments to geopolitical shifts, 2025 has been a year of transformation. We look back at the stories that shaped our world and set the stage for the challenges and opportunities of 2026.
By Emily Watson - Education & Social Issues Correspondent
Last Updated: December 17, 2025
The year 2025 in review
Transformative Year
2025 will be remembered as a year when artificial intelligence went mainstream, climate action accelerated, and geopolitical alignments shifted. Each month brought developments that will echo for decades.
AI Revolution
The launch of GPT-5 and GPT-6, along with Google's Gemini 2.0, demonstrated AI capabilities that surprised even researchers. AI-generated content became ubiquitous, raising questions about authenticity and employment.
Climate Milestones
COP30 delivered the most ambitious climate agreement yet. Solar became the cheapest energy source in most countries. Amazon deforestation dropped to 15-year lows.
Looking Ahead
2026 promises to be equally consequential: a pivotal presidential election, continued AI advancement, and critical tests of international cooperation await.