Are your memories real? Physicists revisit the Boltzmann brain paradox

Coffee doesn’t just energize—it actively reshapes the gut and mind. Researchers found that both caffeinated and decaf coffee altered gut bacteria in ways linked to better mood and lower stress. Decaf even improved learning and memory, while caffeine boosted focus and reduced anxiety. Together, they show coffee works through multiple pathways beyond just caffeine.

Long before humans spread across the globe, a deadly disease may have quietly shaped where our ancestors lived—and even how we evolved. New research reveals that malaria didn’t just threaten early human survival; it actively pushed populations away from high-risk regions across Africa, fragmenting groups over tens of thousands of years. This separation influenced how different populations met, mixed, and exchanged genes, helping shape the genetic diversity we see today.

When cows burp, they send a substantial amount of methane gas into the air, which makes them a leading contributor to greenhouse gas emissions. According to research published in the journal Science, a newly discovered hydrogen-producing structure within the microbes of cow stomachs may influence how much of that gas is expelled.

We tend to think of climate change impacts as dramatic and destructive. Storms and floods that bring down landslides and swamp streets, or raging wildfires that tear through forests and farmland.