Spiders around your home are not all stray visitors. Some indoor spiders have traits that make houses a better fit than the outdoors. A few spider species can spend their whole lives inside. Some spiders have evolved to live in houses, especially the harmless house spiders that handle steady indoor temperatures, easy shelter, and reliable…
Spiders have eight legs, arranged as four pairs of legs. That trait is one of the easiest ways to tell spiders apart from insects and many other lookalikes. This body plan helps explain why spiders have eight legs and how that fits into spider anatomy across different spider species and the larger group Arachnida. Spiders…
Spiders are far more common than most people think. The best current estimates put their numbers in the quadrillions. Scientists do not count each spider one by one. They use population models, habitat data, and species records to estimate how many spiders live across the planet. Billions upon billions of spiders are still here, and…
Spiders do not have ears, so the answer to have spiders got ears is no. Even so, they can still detect sound in smart ways that help them find prey and avoid danger. Your idea of spider hearing should be more like sensing motion, air pressure, and vibration than listening with ears. Tiny hairs, body…
You may have seen the question have spiders been found on Mars after striking images from orbit made the Red Planet look strangely alive. The short answer is no, not in the animal sense. What you are seeing are real geological features on Mars, usually called araneiform terrain, or spider-like patterns carved into the surface….
Spiders have been to space. NASA learned that they can still build webs in microgravity, even if they need time to adjust. The best-known example is Arabella and Anita, two cross spiders that flew on Skylab 3 in 1973. They became a small but important part of space science. The Short Answer And The First…
Most spiders in the UK are more likely to scare you than harm you. Fatal spider bites are extremely unlikely, and the spiders you see at home are usually harmless. The real risk is a painful bite, a local skin reaction, or, in rare cases, an infection that needs medical care. You are far more…
Spiders appeared long before dinosaurs, and the fossil record shows that their lineage stretches back at least 380 million years. When dinosaurs appeared, spiders were already ancient animals with a long history. If you have ever wondered whether spiders have been around since dinosaurs, the answer is yes, but with one important detail. Only certain…
Many people ask if spiders are worse this year when they start seeing more webs in corners, basements, and door frames. Spider activity can feel higher in some years because weather, seasonal timing, and indoor food sources all shift at once. You may see more spiders not because they are multiplying everywhere, but because conditions…
Spiders have existed for a very long time. The best answer to how long spiders have been around is at least 380 million years, with origins likely stretching back close to 400 million years. That means spiders are older than dinosaurs, birds, and even many of the forests you picture today. You can think of…