http://TheScienceExperts.com Science Questions - asked and answered Fri, 16 Jan 2009 03:03:31 +0000 http://backend.userland.com/rss092 en While the American grizzly bear is fearsome and cool to look at, the polar bear is generally considered the largest bear in the world. Its average weight is between 900 and 1500 pounds. The brown bear, averaging 500 to 900 pounds a close second. The biggest polar bear ever recorded was ... http://TheScienceExperts.com/answers/what-is-the-largest-bear-ever-recorded There has been some debate on this, depending on how you define an animal's size. The Bumblebee Bat (Craseonycteris thonglongyai) is definitely the world's smallest species of bat. It is about 30mm in length and weighs about 2 grams (less than an American penny). It is the only known species ... http://TheScienceExperts.com/answers/what-is-the-worlds-smallest-mammal The largest spider in the world is a tarantula called the Goliath Birdeater. An adult can weigh over four ounces (about the size of a large mouse) and has a leg span of up to 12 inches. The spider was given its unique name by Victorian explorers who witnessed one ... http://TheScienceExperts.com/answers/what-is-the-largest-spider-in-the-world Mimosa pudica (also known as the "sensitive plant" or "Tickle Me plant") is well known for its rapid leaf movement. In the evening the leaflets will fold together and the whole leaf droops downward. It then re-opens at sunrise. This type of movement is called nyctinastic movement. The leaves also ... http://TheScienceExperts.com/answers/how-does-the-tickle-me-plant-work This is a very generic question, but one that actually gets asked quite frequently.  Of course, the short answer is that snakes have a varied diet, depending on factors such as their species, size, age, geographic locale, etc. A fairly accurate answer for what most snakes eat might be: insects, ... http://TheScienceExperts.com/answers/what-do-snakes-eat This is a bit of a humorous post as this question has made the rounds on the Internet for the last several years. The short answer is: goldfish are egg-layers and as such, they're never considered pregnant. A female goldfish carrying eggs is said to be "ripe" but no ichthyologist ... http://TheScienceExperts.com/answers/what-is-a-pregnant-goldfish-called Some magnets are natural (lodestone and magnetite are naturally occurring), and some magnets are man-made. The magnets made in the laboratory are usually made of a mixture of iron, cobalt, nickel and other elements. The substances are magnetized by a couple of different methods. You could move a permanent magnet ... http://TheScienceExperts.com/answers/where-do-magnets-come-from What causes the Bubonic Plague and how deadly is it? The Bubonic plague is a disease of the lymphatic system caused from the bite of an infected flea. The fleas are often found on rodents and seek live hosts (such as humans) when their rodent hosts die. Once established, bacteria rapidly ... http://TheScienceExperts.com/answers/bubonic-plague No one person is considered to have discovered Mars. As it is very bright in the night sky, it has been visible since the first humans gazed up to the heavens. What we do know is that it was named after the Roman god of war- presumably because of its ... http://TheScienceExperts.com/answers/who-discovered-mars At birth, the genes that make the pigment protein are not being read by the cell (they are turned off). Almost all babies have blue eyes because the iris has not yet made brown pigment (called melanin) that colors the iris. As the child's eyes are exposed to light (as ... http://TheScienceExperts.com/answers/why-do-all-newborn-babies-have-blue-eyes