In this six-part series, NASA Goddard’s chief scientist, Jim Garvin, gives a talk on what scientists have found out about Mercury, Venus, Mars, some
Time is a bit tight this week, so there will be guest videos from today through Thursday, and then a big post about firestorms
We’ve seen that the two chief methods of flood control involve building barriers and keeping river channels open so they can hold as much
Of crystal was his habergeon, his scabbard of chalcedony, his javelins were of malachite and stalactite – he brandished them, and went and fought
Potassium is a metal like lithium, but no one builds batteries out of it because it’s evil: Well, the human body is mostly water
In a flood people turn first to barriers – levees, sandbags, flood walls, and the like. This works well, but failure can be catastrophic.