Quantum computers are not faster laptops. They will not replace the machine you are reading this on. They use quantum states — superposition, entanglement, and interference — to run certain algorithms that ordinary computers handle poorly. Potential applications include chemistry and materials science, some types of factoring, and certain simulation problems. For almost everything else,…
Blockchain is usually sold as a new kind of trust. The more useful question is smaller: What problem does a chain of signed blocks actually solve, and where does that design stop helping? Bitcoin, launched in 2009, used a public ledger to let people transfer a digital token without relying on a bank to maintain…
Alcohol is one of the most widely used psychoactive substances in the world. It is legal and socially accepted in many countries, but that does not mean it is harmless. Alcohol affects the brain almost immediately after it enters the bloodstream and can influence coordination, judgment, memory, mood and reaction time. With repeated or heavier…
The search for intelligent life beyond Earth is a real scientific program. Radio surveys and related work at places such as the Green Bank Telescope, the Allen Telescope Array, Parkes, and Breakthrough Listen look for signals that do not look natural: narrow radio tones, pulsed beacons, and other technosignatures. This article asks one question. What…
What if reality is the ultimate online game—a simulation so slick it makes our games look like toys? Imagine zipping to the edge of the map in a game like GTA Online, breaking all the rules, versus doing the same in reality near light speed. Let’s compare the two and see why reality’s ability to…
Artificial intelligence is transforming our world, but it comes with a surprising cost. Discover how much water AI really uses, the massive electricity demands of data centers, and the other resources powering modern AI.
There is no single global drug problem. UNODC estimates that about 331 million people used drugs in 2024. Most of them used cannabis. Opioids, however, account for a much larger share of drug-related deaths. At the same time, the cocaine market continues to expand, while new synthetic opioids continue to emerge, sometimes in forms that…