Although 2025 did not set a new global temperature record, it still delivered clear signs of a warming planet.

Scientists calculate that last year was the third-hottest on record, following 2024 and 2023. Several climate monitoring teams say these last three years approach the warming limit set by the 2015 Paris climate agreement.

Our planet has a memory. Deep within ice cores and ocean sediments lies evidence of a time when Earth looked fundamentally different from the world we know today. The parallels are unsettling. The question isn't just academic curiosity anymore.

At half the size of Earth and one-tenth its mass, Mars is a featherweight as far as planets go. Yet new research reveals the extent to which Mars is quietly tugging on Earth's orbit and shaping the cycles that drive long-term climate patterns here,

Rain gauges did not exist millions of years ago. Instead, researchers turn to indirect clues left behind in rocks, soils, and fossils. These natural clues are called proxies. Proxies help scientists estimate past climate conditions based on physical evidence.