Roman-era swords found in Dead Sea cave: “Almost in mint condition” https://ift.tt/iXbV3s4

LED lights are erasing our view of the stars — and it’s getting worse https://ift.tt/3QwqN20

Photos from around the world of the super blue moon https://ift.tt/E3dZ1N2

What is St. Elmo’s fire? Phenomenon caught on video https://ift.tt/DNJfHX8

Amur tiger dies in tragic accident at Colorado zoo https://ift.tt/YwtoQzI

Dirty air biggest extrenal threat of all to human health, study finds https://ift.tt/ksa45wr

Here’s what the hurricane categories mean https://ift.tt/sJZ0wSl

Why you sweat, and why that’s a good thing https://ift.tt/Wh4gwX6

The science of sweat https://ift.tt/9XdftFO

The science and art of lightning https://ift.tt/ynsJgpw