Buzz
In science, controversy isn't just anticipated—it's encouraged. Several theories that were once deemed controversial, like plate tectonics, have ultimately been substantiated. This highlights the idea that revolutionary breakthroughs often stem from bold, unconventional ideas. And, as history shows, new evidence can surface at any moment to support theories that were once dismissed as fringe.
10. Darwin’s Theory of Jump Dispersal
Darwin's theory of evolution has sparked debates since its inception. While the core principle of natural selection is widely accepted in scientific circles today, some of its offshoot theories, especially the one Darwin proposed to explain how closely related species can evolve similarly despite being separated by vast oceans, have faced more skepticism.
Darwin referred to this idea as “jump dispersal.” He proposed that certain organisms—ranging from bacteria to insects to small animals—might have traveled across oceans by various means, such as ice floes, seaweed, or even fragments of tundra.
Nevertheless, a computer simulation comparing this theory with the more widely accepted one—migration via ancient land bridges—revealed that the jump dispersal hypothesis outperformed its rival in terms of statistical probability.
9. The Formation of Buckyballs
Fullerenes, often known as “buckyballs,” are spherical carbon structures that resemble soccer balls. These molecules form naturally on a molecular scale. The more widely accepted “bottom up” model proposes that they are created one atom at a time, similar to assembling a Lego model.
The more debated “bottom down” model argues that buckyballs originate from the disintegration of larger atomic structures. For the first time, this lesser-known theory has gained substantial backing, thanks to the discovery of asymmetrical buckyball variants that seem to form from bigger structures and are currently undergoing a transition.
This finding is significant due to the increasing role of buckyballs in contemporary medical research. For instance, radioactive ions trapped within buckyballs have shown potential in targeting cancerous cells while sparing healthy tissue. The ability to mass-produce these microscopic carbon cages could revolutionize various areas of medicine.
8. Humans as Prey
In 2005, anthropology professor Robert Sussman published his book Man The Hunted, where he argued that humans evolved not as hunters but as prey, primarily relying on plant-based diets and only hunting when the opportunity arose. The book stirred controversy by questioning a long-standing view of human evolution, but its claims are strongly supported by fossil evidence and the behavior of modern animals and primates.
There is a wealth of supporting evidence, both circumstantial and scientific. Human intelligence and social cooperation may have developed as a means to outsmart predators. Additionally, fossil records show that our ancestors were smaller, with flat teeth more suited for gathering food than for hunting.
Moreover, the rarity of decomposing flesh consumption and cannibalism among primates suggests that Sussman's theory goes beyond just scavenging rather than hunting. Sussman contends that the Judeo-Christian belief in humans as “natural killers” has contributed to the misconception.
7. Sympatric Speciation
In contemporary evolutionary theory, it is generally believed that speciation—the process by which a single species evolves into two or more distinct species—requires geographic isolation. This principle has been widely accepted.
While this idea has been contested for years, the alternative concept—that “sympatric speciation” can take place within the same geographic area—has been difficult to convince the evolutionary community. However, the recent discovery of a new Brazilian ant species might once again challenge the prevailing understanding, suggesting that the traditional view may not always hold true.
Found on a university campus in Sao Paulo, this new ant species is a close relative of a local fungus-farming ant. The new ants are smaller, have wings, and instead of assisting with farming, they consume the fungus collected by the farmer ants. While not definitive, the German scientist who made the discovery believes this could serve as an example of speciation happening in real-time.
6. The First Settlers of the Americas
According to the traditional view of how the Americas were first populated, a drop in sea levels exposed a land “bridge” that connected Asia to Alaska. Early human settlers followed retreating glaciers into the Great Plains and eventually populated North America.
However, a recent archaeological find on the East Coast may provide a significant challenge to this theory. Stone tools that closely resemble those made by the Solutreans, ancient people from present-day Europe, were discovered and dated to be thousands of years older than the proposed bridge migration period.
The proponents of the “Solutrean theory” argue that it was European migrants, not Asians, who followed the southward expansion of polar ice during the Ice Age, ultimately reaching North America.
5. Turin’s Theory of Olfaction
Greek fragrance chemist Luca Turin argues that the human olfactory sense can detect isotopes—essentially, the ability to sense differences in molecular vibrations. Although a 2004 experiment using acetophenone—a compound with eight hydrogen atoms and a sweet, fruity scent—yielded negative results, Turin’s team had more success with a later experiment involving a different compound.
Cyclopentadecanone, which contains 28 exchangeable hydrogen molecules, was used in the later experiment. Turin’s team found that when more than half of these molecules were rearranged, volunteers detected a shift in the smell, which changed to a burned or roasted odor.
This finding is the strongest evidence so far supporting a theory that redefines the olfactory sense, suggesting it may operate not as a simple physical mechanism, but rather as a quantum process. According to this theory, smell receptors are sensitive not to the shape of molecules but to their vibrational spectra—a concept completely alien to molecular biology.
4. The Transfer of Alzheimer’s Disease
Alzheimer’s disease is closely linked to the accumulation of a particular type of protein in the brain. As a result, it has long been speculated that the disease could potentially be transmitted through surgical tissue transplants (but not via casual contact). Unfortunately, a recent study suggests that this transmission is indeed possible, highlighting the need for more stringent screening of transplant donors.
The research involved examining the brain tissue of eight patients who had passed away from Creutzfeldt-Jakob disease, a condition known to be transmitted through nerve-tissue grafts the patients had previously received. Of these eight individuals, seven were found to have a buildup of the Alzheimer’s-related protein in their brains, even though some were as young as 28 at the time of their deaths.
3. The Multiverse
In 2014, the intriguing Background Imaging of Cosmic Extragalactic Polarization 2 (BICEP2) South Pole experiment seemed to confirm the presence of gravitational waves by detecting extraordinarily small ripples in space-time. Researchers suggested that if these gravitational waves could be confirmed through further study, they might substantiate the theory of cosmic inflation. This could offer compelling indirect evidence for the existence of the multiverse.
Nearly all inflation models—the concept of the universe's gradual expansion—permit the possibility that inflation could be eternal and imply that our observable universe is merely a tiny region within a far larger expanse. Additionally, the big bang might not have been a singular event but rather something that occurred repeatedly. The conditions supporting life in our universe may have emerged simply due to infinite possibilities. Within the multiverse, countless universes could exist, many governed by entirely different physical laws.
In 2016, scientists at the Laser Interferometer Gravitational-Wave Observatory validated the existence of gravitational waves, as predicted by Einstein.
2. String Theory
Since its introduction in the 1980s, string theory has sparked intense debate, and remains the closest theoretical physics has come to a unified "theory of everything." It suggests that all natural phenomena, even those that seem contradictory such as gravity and quantum mechanics, arise from the vibrations of infinitesimally tiny loops of pure energy known as "strings."
A group of string theorists is working to prove the unprovable theory through a process of exclusion. By employing a type of gravity-to-quantum mechanics translator, they've established a set of "consistency conditions" that any unified theory—one that combines both quantum mechanics and gravity—must satisfy.
They discovered that only quantum theories involving strings can produce Einstein’s model of gravity. While physical proof of string theory’s accuracy may never materialize, advocates assert that the lack of any viable alternatives means string theory must be the correct explanation.
1. The Ocean Inside The Earth
The discovery of a small mineral fragment known as ringwoodite has provided near-confirmation of a once-dismissed but now widely accepted theory: that an ocean exists beneath the Earth’s surface. Natural ringwoodite has only been found in meteorites until now.
Research indicates that olivine, a mineral, transforms into ringwoodite—created artificially in labs—under the immense pressures deep within the Earth's mantle. Ringwoodite contains water as 1.5 percent of its composition, in the form of hydroxide ions, a result of both extreme heat and pressure and substantial water content.
The discovery of a natural sample not only confirms the existence of the theorized underground ocean but also suggests that its volume may rival that of all the Earth's surface oceans combined.
