Scientists are just starting to understand the tardigrade. It can survive boiling water, outer space, and extreme radiation. Following is a transcript of the video. This funny looking little guy ...

Sound as we know it does not exist in space. That’s because, on Earth, sound mainly travels to our ears via vibrating air molecules. Because space is a vacuum, meaning there is no matter at all ...

Here's a look at some others who found themselves stuck in space — by choice or not — along with some cool spaceflight ...

Because a red giant is so large, its heat spreads out and the surface temperatures are predominantly cool, but its core remains red-hot. Red giants exist for only a short time—perhaps just a ...