Frogs and toads…what’s the difference? The long back legs of frogs make them expert leapers, and most stay near their aquatic homes. Toads can only hop, thanks to their short hind legs, but they can survive away from water.
Start investigating the hundreds of species of frogs and toads — and there's no need to worry about getting warts.
Now that TVs have gotten so good — they can show details our eyes can't even detect — how could they get better? Visit the sites below to find out.
But first, let's go back to a time when a small, flickering, black-and-white image was the most amazing thing many people had ever seen. This rare film shows not only TV at its start, but the man who imagined it.
Do you need the temperatures found in stars to get atoms to fuse together and release torrents of energy? That's what the textbooks say. But in 1989, two scientists announced they'd produced nuclear fusion at room temperature.
Had they? Not a chance, say most scientists. But others, as you’ll see below, are sure cold fusion is real.
An allergy occurs when a normally harmless substance is perceived as a threat by the body, which mounts a response. It can take many forms, including sneezing, coughing, runny nose, and rash. Allergies also can often bring on asthma symptoms.
Some allergies, such as pollen, are seasonal, while others, such as pet dander, occur year-round. The tendency to have allergies is often inherited.