A classic experiment to demonstrate the curvature of a body of water is to place markers (like flags) a fixed distance above the water in a straight line, and then view them along that line in a telescope. If the water surface is flat then the markers will appear also in a straight line. If the surface of the water is curved (as it is here on Earth) then the markers in the middle will appear higher than the markers at the ends. Here's a highly exaggerated diagram of the effect by Alfred Russel Wallace in 1870:
This is a difficult experiment to do as you need a few miles for the curvature to be apparent. You also need the markers to be quite high above the...
A misleading headline is making people think that a physical object has been teleported from the ground into space, leading to all kinds of excitement and speculation about Star Trek style teleporters.
In fact nothing like that has happened at all, if you actually listen to the BBC piece, you'll find that what has been transmitted is just information. Nothing physical has moved from the ground into space.
The above image appears to show three different metal rods. The left rod is short and straight. The middle rod seems longer and angles sharply to the right. The right rod appears slightly curved, and has a longer segment going off the edge of the photo.
Actually the rods look like this:
Despite the left rod looking like it's just a few inches, it's actually five feet long. And even though the right rod looks like it's bent very close to the end it's actually bent in the middle, as is the center rod.
I set this up to illustrate some of the problems in visualizing both contrails and the paths of planes that don't leave contrails, especially those that are far away, and so at a shallow angle to the viewer.
A variety of images reported as "UFO"zm show what looks like a glowing disk with some dots on it. These basically look like lens flares, but the dot patterns are unusual, as they vary from irregular, regular, or or semiregular patterns. However they still look very two dimensional - they don't seem to curve around the "orb". Here's a collection of similar images all claimed as "UFOs"
What we are seeing here is a reflected image of the sun with the highlighted reflections of focus pixel. ...
The horizon is visual line that separates the earth from the sky. On land this is usually nearby hills and is quite uneven, but if you have a good view of the ocean the horizon appears as an essentially flat line between the sea and the sky.
It looks flat, and in fact the horizon IS geometrically flat. Since all the points on the ocean horizon are the same distance away from you, and the same distance below you, the horizon forms a flat circle with its center some...
A documentary from Gaia.com claims that what looks like a mummified corpse is evidence of a new species, possibly of extraterrestrial origin.
Now several red flags pop up. Most immediately that Gaia.com has a history of creating videos promoting the idea of ancient aliens, none of which panned out into actual evidence.
But what of the mummy itself? It's claimed that it was found in the Nazca region of Peru. This makes some sense as similar human mummies have been found in the region (which is very dry, and so bodies protected from the elements are naturally preserved by drying out). https://en.wikipedia.org/wiki/Chauchilla_Cemetery
This video by YouTuber LouB747 has been shared thousands of times on Facebook, and many people think it shows some kind of deliberate spraying, a "chemtrail".
The video looks very odd if you don't know what you are looking it. It's a Boeing 787 that's flying more or less on an opposite track to Lou's plane, but about 1,000 feet lower. It starts out looking like this:
Similar videos have show up before, when the conditions, lighting, and angles are right. This one is from 2010.