Vampire bats may seem like a blood problem you may have to deal with. However, you should be worrying about having a stroke!
If you look at the horizon at sunset–exactly as the last sliver of sun disappears–you might see a flash of brilliant green blaze across the sky.
In particular, the cervix seems to be at risk, one reason why an annual Pap smear is important.
That makes chimps, along with orangutans and humans, the only species that appear to recognize themselves in the mirror.
Any motion takes energy to perform. And little motions like rearranging things on your desk or stretching your back, if you do them all the time, start to add up.
How fast anything spins is partly determined by how its weight is distributed. The closer an object’s weight is to its axis of rotation, the faster it spins. To picture this, imagine an ice skater doing a pirouette. When her arms are extended, she spins slowly.
But the farther away the gun is, the wider the beam gets spread so that only a small fraction of the total light power can go into anyone’s eye.
The back of your eye, called the retina, has two kinds of cells: rods and cones. In bright light the cones are what we use, while in dim light the cones are less active and the rods take over.
The relationships between plants and insects are often intricate and complex. One such relationship is that between the yucca plant and the yucca moth.
It doesn’t even matter that we’re not related. DNA is a pattern or sequence of nucleotides, right? You might also remember that there are actually only four different nucleotides, and that they’re arranged in pairs.
Is drinking yourself “blind” just an exaggeration, like “eating till you burst”? It’s unlikely that you’ll actually burst from a big dinner, or really go blind from a few drinks, but alcohol will in fact affect vision in two different ways.
Ever wonder why operating rooms are so cold? Find out on today's Moment of Science.
Find out what metal-loving plants are on this Moment of Science.
Do lemmings really follow each other off a cliff to their death? No, but there are mysteries surrounding the rodents. Over the years, there have been many tales of these Arctic rodents voluntarily jumping off cliffs and plummeting into the sea.
Have you ever tried to listen while underwater? What is audio like underwater?
The prefrontal cortex is the region of the brain located just behind the forehead. This is where higher-level cognition occurs, such as recalling whether a word was heard aloud or read. Most people show evidence of more processing on the right side of the cortex. However, research has shown that many elderly people use both [...]
With a water shortage looming, we should all try and conserve as much of it as possible.
In the wild, unshod hooves grow downwards approximately two-tenths of an inch per month. A wild horse’s natural daily activities, however, wear away the hoof at roughly the same rate, maintaining the proper balance between hoof wall and sole.
More importantly, rats and humans often suffer from the same diseases. That’s because humans and rats have the same basic physiology, similar organs, and similar body plans.
In most air bags, the sensor triggers chemical reactions that produce nitrogen gas from chemical tablets stored in the unit. The gas whooshes into the bag and inflates it in only a few milliseconds.
If kept dry, these cysts will remain viable for many years. Placed in salt water, the cysts rehydrate and the shrimp resume development.
What Ben actually did in his famous 1752 experiment was to cause some excess electrical charge near a storm cloud to ground out through his kite string–still an impressive demonstration, but a much less powerful prospect than an actual lightning strike.
Killer whales communicate in a variety of dialects. There are discernible differences, however, between the chatter of killer whales that eat only fish and those that eat both fish and seals.
The Leatherback turtle is special because of its ability, unlike other sea turtles, to survive in cold waters.
In the animal kingdom, much like in the world of humans, there are many techniques that animals will use in order to attract mates. Parrots, for example, have glowing heads.
Playing dead doesn't seem like much of a strategy, but it works for the opossum, commonly known as the possum.
Ever wonder if you can actually turn blue while holding your breath? Find out on this Moment of Science.
If you think dating is tough, just be glad you aren’t a garden snail. When you live life at a snail’s pace, you’d better be able to mate with the next snail you meet without worrying if it’s male or female. That’s why garden snails are hermaphrodites and can take on both the male and female roles in reproduction.
You can see this more easily by imagining what would happen if the earth were flat. The moon would still travel in a horizontal line above the ground; but because it’s also falling, it would come closer and closer to the flat earth until it collided.