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TIL Astronomers image the Sun in detail using hydrogen-alpha telescopes with monochrome cameras rather than colour as they can make full use of their sensors. This means processing software is used to make the Sun appear in colours like yellow and orange

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D88r TIL of the Daughter from California Syndrome where relatives of terminal patients who haven’t seen them in a long time demand aggressive procedures to prolong their life.
0wrpp TIL of Othmar Ammann, a Swiss-American engineer. He was the lead engineer of more than half of NYC crossings including the George Washington Bridge and the Lincoln Tunnel. His designs were inexpensive and elegant allowing the projects to be completed on time and under budget
P1K9w TIL that one of the reasons why women are less likely to be given CPR than men is because people can be afraid of inappropriately touching a woman's chest while administering CPR. To try to address this issue, a vest with "breasts" was invented to put on flat-chested CPR training manikins.
4X76 TIL that the Korean DMZ is an involuntary nature reserve and is home to extremely rare tigers and bears
kxv5 TIL That on the summer solstice (today) the sun will line up perfectly with ancient structures all around the world!