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For 20 years, photographer Joel Sartore has been documenting animals through his Photo Ark project, which has now reached its 18,000th species. The latest addition is the critically endangered red handfish, a tiny marine fish that uses its fins to move across the seafloor. Sartore hopes the project will raise awareness about threatened species and

During the solar eclipse of 1868 in India, astronomers stumbled upon an enigmatic yellow spectral line, initially observed by Pierre Jules Janssen. Although its significance was not immediately recognized, Norman Lockyer soon named the unidentified element helium upon further analysis. Eventually, William Ramsay verified helium’s presence on Earth in 1895 by extracting it from a

Discarded human hair is now preventing oil pollution in Rio de Janeiro’s Guanabara Bay. Each gram of hair absorbs approximately five grams of oil, repelling water effectively. These hair barriers, made from salon waste, can remain in the water for four months. The initiative protects vulnerable mangrove ecosystems from chronic and everyday oil leaks. This

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