Infrared versus traditional Finnish sauna, which is better? This is one of the most common sauna questions I receive. My short answer is if I had access to both, I would choose a traditional Finnish sauna. It's the modality behind the strongest long-term evidence where frequent use is associated with lower cardiovascular and all-cause mortality and a lower risk of dementia. Infrared sauna is not useless. It uses radiant heat, but at a much lower air temperature, so many people tolerate longer sessions. However, infrared has not been shown to be equivalent to Finnish sauna. Its evidence base is much smaller, devices and protocols vary widely, and we don’t have comparable long-term data for cardiovascular disease, dementia, or longevity. In a 2025 head-to-head study, traditional sauna raised core temperature, whereas a 45-minute far-infrared session increased skin and body temperature and cardiac output but did not raise core temperature. The thermal dose (and potentially the adaptations) may therefore be different. Choose Finnish sauna when you can. If infrared is all you have, or it’s the sauna you’ll use consistently, use it. There is currently no validated time-for-time conversion between the two.

Brewing up baby stars ⭐ @NASAWebb used infrared light to peer through the dust in this nebula, revealing many stars of different ages. This helps us study how stars change over time.

Blacksmith is part of @Redpoint's 2026 InfraRed 100 today. We started Blacksmith because CI needed its own cloud. Just over two years later, we're running millions of CI jobs every day for some of the fastest-growing companies. The same primitives we built to power CI will power much more than just CI. There’s a lot more coming :)

Bangladesh's Ganges river delta photographed in near-infrared from orbit. The lush plant life appears in bright magenta, starkly contrasting the water and revealing complex branch structures.

The truth about red light therapy for your eyes: - Glenn Jeffries' lab: red or near-infrared light to the eye at about 2 feet for a couple of minutes a few times a week early in the day - Two published studies show offset of vision loss from macular degeneration in people over 40 - Mechanism: better-functioning mitochondria in photoreceptors and fewer reactive oxygen species - Dose brightness wavelength and timing are still open questions - Any light that is too bright can damage your eye - it should never be uncomfortably bright Dr. Jeffrey Goldberg on @hubermanlab

Photographer Ryan Pierse captured a series of images — that he’s titled “Infrared” — throughout the World Cup using a mirrorless camera that has been modified to capture the electromagnetic spectrum beyond what's visible to the human eye.