Watching the news can feel overwhelming, almost like the world is on the brink of collapse. Thankfully, science is bringing us the positive updates we’ve all been waiting for.

In 2025, researchers have dedicated themselves to safeguarding us from existential threats, enhancing both human and environmental health, and revealing the mysteries of our universe.

Here are our top feel-good science stories for 2025.

1. ‘City Killer’ Asteroid Likely Won’t Strike Earth

In February, concerns arose when the likelihood of asteroid 2024 YR4 colliding with Earth in 2032 escalated from 1.2% to 3.1%, labeling it one of the most hazardous asteroids tracked.

This asteroid, estimated at around 60 meters (197 feet) in diameter, could have unleashed energy exceeding 500 times that of the Hiroshima bomb, putting a major city at risk.

Fortunately, NASA has reassured us that the threat has diminished significantly and now states there is no significant threat from this asteroid, although it estimates a 3.8% chance of it hitting the moon.

2. Vitamin Supplements May Help Slow Aging

A large-scale clinical trial led by researchers at US General Brigham Massa has discovered that vitamin D supplements can help maintain telomere length (protective caps on chromosomes that shorten with age).

The double-blind study involving over 1,000 participants found that vitamin D could potentially delay aging by nearly three years compared to a placebo group.

3. The World’s Largest Camera Takes Its First Photo

The newly launched Vera C. Rubin Observatory has captured its first snapshot of the universe. Each image is so vast that it would take 400 ultra-high-definition TVs to view it in its entirety.

The observatory will collect an immense amount of data every night for the next decade, aiding scientists in exploring cosmic mysteries such as the expansion of the universe and dark matter.

4. “Forever Chemicals” May Not Be So Permanent

Recent research has uncovered a method to effectively destroy PFAS (polyperfluoroalkyl substances), harmful chemicals linked to various cancers that infiltrate our homes through packaging and nonstick cookware.

The new technique utilizes phosphates to break the resilient carbon-fluorine bonds that make PFAS so persistent in the environment and detrimental to health.

5. Renewable Energy Surpasses Coal for the First Time

In the first half of 2025, global wind and solar energy production exceeded that of coal, marking a pivotal advancement towards sustainable energy. This achievement is mainly due to significant renewable energy projects in China and India, alongside a temporary downturn in coal usage.

Additional reporting by Ezzy Pearson

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