World of biology on Instagram: "When hydrogen peroxide (H2O2) and potassium permanganate (KMnO4) react, they undergo a redox reaction, resulting in the formation of oxygen gas (O2), water (H2O), and manganese dioxide (MnO2). The reaction is exothermic, meaning it releases heat. Potassium permanganate acts as a catalyst, speeding up the decomposition of hydrogen peroxide into oxygen and water."

NASA on Instagram: "What's it like to float through the International Space Station? For more than 25 years—since Nov. 2, 2000—humans have been living and working on the @ISS. More than 290 people from 26 countries have visited the station; their work and scientific research is helping us learn how to live in space (and prepare for missions to the Moon and Mars) while making life better back on Earth. As we celebrate this milestone, we've released a new 15-minute tour of the station; follow alon