Researchers point out that before further verification, we cannot determine whether there is a causal relationship or merely a correlation between using the internet and the sense of happiness felt.

In the health sector, electronic cigarettes have been found to produce a variety of toxic substances. E-cigarettes generate aerosols for inhalation by heating a liquid containing nicotine and flavors. However, during the heating process, these chemicals may undergo pyrolysis and transform into new toxic chemicals. A study that used machine learning to predict the pyrolysis reactivity of chemical flavors produced during the heating process of e-cigarettes has revealed many potentially toxic chemicals they might generate, highlighting the potential health risks of e-cigarettes. The researchers used a Graph Convolutional Network (GCN) to predict and analyze 180 kinds of chemical flavors, confirming 1169 possible pyrolysis products from experimental mass spectrometry data. By comparing with the Global Health Organization's Chemical Classification and Labeling Standards (GHS) database, they found that 127 products have acute toxicity, 153 could be damaging to health, and 225 have an irritant effect. Based on these findings, researchers suggest that governments should strengthen regulation and restrictive measures on e-cigarettes to mitigate the potential health threats they pose.

In the field of materials science, the purest silicon to date has been developed, which is a fundamental and critical step for constructing quantum computers. Quantum bits, the core units of quantum computers, are highly susceptible to environmental factors, such as temperature changes, and current quantum computers can only maintain coherence for a very short time with a low error rate. Although quantum bits are usually constructed from superconducting metals like tantalum and niobium, using traditional semiconductor materials like silicon may offer advantages such as lower manufacturing costs and longer coherence times. However, natural silicon contains three different isotopes: silicon-28, silicon-29, and silicon-30, and isotopes other than silicon-28 may disrupt the coherence of quantum bits, increasing the probability of computational errors. A recent study has produced silicon of extremely high purity through a new technique, capable of constructing more reliable quantum bits, and provides an ideal material for manufacturing large-scale, high-precision quantum computers. One major advantage of silicon-based quantum computing is that current microchip manufacturing technology can be used to produce quantum bits for silicon-based quantum devices. The research team's next plan is to demonstrate that using this high-purity silicon material can maintain the coherence of a large number of quantum bits.

A discovery in the medical field suggests that toad venom could be helpful in treating certain mental illnesses. An increasing amount of research considers that some hallucinogens might have therapeutic potential for alleviating mental disorders such as depression and anxiety. For instance, a toxin secreted by the Colorado River toad contains the hallucinogen 5-MeO-DMT, which is associated with intense psychedelic experiences.

Recently, a new study published in the journal "Nature" made a significant breakthrough in the treatment of mental illnesses. Scientists developed a new variant of the experimental drug 5-methoxy-N,N-dimethyltryptamine (5-MeO-DMT), which showed great potential in treating anxiety and depression while avoiding the side effects of traditional hallucinogens.

The research team, by deeply studying the interaction mechanism between 5-MeO-DMT and the serotonin receptor 5-HT1A, decided to structurally modify the compound, especially its critical sites, and they ultimately succeeded in creating an improved variant. Through experiments on mice, the researchers observed that this variant exhibited antidepressant effects, with potency similar to the psychedelic drug LSD and commercially available 5-HT1A agonists.

It is noteworthy that the therapeutic action of this new drug did not accompany any hallucinogenic effects. Scientists also found that compared to the 5-HT2A receptors which control sensation and emotion, this variant had an 800-fold higher affinity for 5-HT1A receptors. This finding suggests that its therapeutic benefits are likely primarily derived from the interaction with 5-HT1A receptors, thereby confirming the feasibility of this receptor as a therapeutic target.

This study provides new insights into how certain hallucinogens regulate receptors in the brains of mammals and points to new directions for the development of medications for the treatment of mental illnesses.