Frame Dragging

One prediction of Einstein’s theory of general relativity is that when a large object moves, it drags the space-time around it, causing nearby objects to be pulled along as well. It can occur when a large object is moving in a straight line or is rotating, and, although the effect is very small, it has been experimentally verified. The Gravity Probe B experiment, launched in 2004, was designed to measure the space-time distortion near Earth. Although sources of interference were larger than expected, the frame-dragging effect has been measured to an uncertainty of 15%, with further analysis hoping to reduce this further. The expected effects were very close to predictions: due to the rotation of the Earth, the probe was pulled from its orbit by around 2 meters per year, an effect purely caused by the mass of the Earth distorting the space-time surrounding it. The probe itself would not feel this extra acceleration because it is not caused by an acceleration on the probe, but rather on the space-time the probe is traveling through–analogous to a rug being pulled under a table, rather than moving the table itself.

Negative Energy

Theoretically, the lowest temperature that can be achieved is absolute zero, exactly ?273.15°C, where the motion of all particles stops completely. However, you can never actually cool something to this temperature because, in quantum mechanics, every particle has a minimum energy, called “zero-point energy,” which you cannot get below. Remarkably, this minimum energy doesn’t just apply to particles, but to any vacuum, whose energy is called “vacuum energy.” To show that this energy exists involves a rather simple experiment– take two metal plates in a vacuum, put them close together, and they will be attracted to each other. This is caused by the energy between the plates only being able to resonate at certain frequencies, while outside the plates the vacuum energy can resonate at pretty much any frequency. Because the energy outside the plates is greater than the energy between the plates, the plates are pushed towards each other. As the plates get closer together, the force increases, and at around a 10 nm separation this effect (called the Casimir effect) creates one atmosphere of pressure between them. Because the plates reduce the vacuum energy between them to below the normal zero-point energy, the space is said to have negative energy, which has some unusual properties.One of the properties of a negative-energy vacuum is that light actually travels faster in it than it does in a normal vacuum, something that may one day allow people to travel faster than the speed of light in a kind of negative-energy vacuum bubble. Negative energy could also be used to hold open a transversible wormhole, which although theoretically possible, would collapse as soon as it was created without a means to keep it open. Negative energy also causes black holes to evaporate. Vacuum energy is often modeled as virtual particles popping into existence and annihilating. This doesn’t violate any energy conservation laws as long as the particles are annihilated shortly afterwards. However, if two particles are produced at the event horizon of a black hole, one can be moving away from the black hole, while the other is falling into it. This means they won’t be able to annihilate, so the particles both end up with negative energy. When the negative energy particle falls into the black hole, it lowers the mass of the black hole instead of adding to it, and over time particles like these will cause the black hole to evaporate completely. Because this theory was first suggested by Stephen Hawking, the particles given off by this effect (the ones that don’t fall into the black hole) are called Hawking radiation. It was the first accepted theory to unite quantum theory with general relativity, making it Hawking’s greatest scientific achievement to date.

The Betz Mystery Sphere

When the Betz family was examining the damage of a strange fire that had decimated 88 acres of their woodland, they made a strange discovery: a silvery sphere, about 20 centimeters (eight inches) in diameter, completely smooth except for a strange, elongated triangle symbol. Initially thinking it might be a NASA gadget or even a Soviet spy satellite, they eventually decided it was most likely just a souvenir. On a moment’s whim, they decided to take it with them.Two weeks later, the family’s son was strumming a guitar in the same room as the sphere. Suddenly, the sphere started reacting to his tunes, emitting a strange throbbing sound and a resonance that deeply disturbed the family’s dog. Soon, the Betz family found the orb had other strange properties. It could stop and change directions when pushed across the floor, eventually returning to the person who pushed it like a faithful dog. It seemed to draw power from solar energy, becoming noticeably more active on bright days. It started looking like something (or someone) was controlling the sphere: It would occasionally emit low-frequency rattling and vibrations, like there was a motor running inside. It seemed to avoid falling and crashing at all costs, as if to protect something inside it. It even managed to completely defy the laws of gravity and climb up a slanted table to avoid falling. A media frenzy ensued. Respected papers such as the New York Times and the London Daily sent reporters to witness the miracle sphere, which repeated its tricks to countless people. Even scientists and representatives of the military were impressed, although the Betz family wouldn’t let them take the sphere for closer examination. However, that soon changed as the sphere took a turn for the worse. It started exhibiting poltergeist–like behavior: Doors started slamming shut at night and strange organ music would fill the house out of the blue. At that point, the family decided to find out what the sphere really was. The Navy analyzed it and found it was . . . a perfectly ordinary (if high-quality) stainless steel ball. To this day, it’s not entirely clear what the mysterious alien sphere is. However, there have been many theories attempting to explain its possible nature. The most plausible of these is, incidentally, the most mundane: Three years before the Betz family found the orb, an artist named James Durling-Jones was driving in the area where it was found. On the luggage rack on his car roof were a number of stainless steel balls meant for a sculpture he was making, some of which dropped off during the bumpy ride. These balls matched the exact description of the Betz sphere, and were balanced enough to roll around at the slightest provocation (the Betz family lived in an old house with uneven floors, so such a ball would appear to behave erratically). These balls could even emit a rattling sound, thanks to tiny metal shavings stuck inside during the manufacturing process.Although this doesn’t explain all of the reported phenomena, it certainly casts a shadow over all the “mysterious ghost ball from outer space” rhetoric.

The Sri Lanka Meteorite Fossils

Researchers who analyzed the remains of a meteorite that fell in Sri Lanka found that their subject was something more than just pieces of space rock. It was an alien artifact in the most literal sense: an artifact made of actual aliens. Two separate studies have found that the meteorite contains fossils and algae that are clearly of extraterrestrial origin.Professor Chandra Wickramasinghe, the leading researcher on the first study, says the fossils provide compelling evidence of panspermia (the hypothesis that life exists throughout the Universe and is spread by meteorites and other solid space debris). However, he is not without his critics. Wickramasinghe just happens to be a noted panspermia enthusiast with a tendency to claim that almost everything is of extraterrestrial origin. What’s more, the traces of life the meteorite contains are actually freshwater species commonly found on Earth, which seems to indicate the object has been contaminated during its time on our planet.

Ancient Aeroplanes

Incas and other pre-Columbian people left behind some extremely puzzling trinkets. Some of the strangest are probably the so-called Ancient Aeroplanes, which are small, golden figures that closely resemble modern jet planes. Originally thought to be zoomorphic (meant to resemble animals), the statues were soon found to have features that look very much like fighter planes’ wings, stabilizing tails, and even landing gears. They were aerodynamic enough that when ancient astronaut believers (allegedly) made model planes with their proportions and fitted them with propellers and (again, allegedly) jet engines, they flew perfectly. All of this has led to speculation that the Incas may have been in contact with (likely extraterrestrial) people who were able to build advanced jet planes, and who perhaps even possessed the technology themselves.Well, that, or these wonderful statuettes might just be artistic representations of bees, flying fish, or other winged creatures. As always, the beauty is in the eye of the beholder.