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Big Fish

The phrase 'big fish eat little fish' may hold true when it comes to planets and stars. Perhaps as many as 100 million of the sun-like stars in our galaxy harbor close-orbiting gas giant planets like Jupiter, or stillborn stars known as brown dwarfs, which are doomed to be gobbled up by their parent stars. Space Telescope Science Institute ...

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BigFish
Astronomy

Microbes In Space

There are creatures that were living on the Space Station before the first astronauts went inside. Astronauts found a few living on the Moon. Scientists believe they could even live on Mars. These ... Continue reading

MicrobesInSpace
Science

Inventor: George Washington Carver

George Washington Carver, born a slave in 1864 (approximately), contributed significantly to agricultural research. Although he was orphaned as an infant, endured hardship in pursuit of his education, ... Continue reading

GeorgeWashingtonCarver
Biology

What are Bacillariophyta?

Bacillariophyta are diatoms. All diatoms are single-celled organisms. They are microscopic, glassy organisms that photosynthesize for food, like plants. Diatoms live in the sediments of freshwater, ... Continue reading

WhatareBacillariophyta
Biology

Why Aren't Mice More Like Us?

The sequence of the human genome was published two years ago, and recently, the sequence of the mouse genome was published. Amazingly, 99% of mouse genes have a counterpart in people. So why are they ... Continue reading

Mice

Nature's Exceptions to Our Rules

NaturesExceptionsWe all learned in grade school that animals are classified into different categories: Mammals have fur, are warm blooded, give birth to their young and feed their babies milk. Birds have feathers, lay eggs and don't have teeth. Reptiles are cold blooded and lay eggs. Fish have gills and are cold blooded. Seems pretty simple, right?

Well, when you actually go out and look at all of the different animals out there, things get pretty complicated. For example, in what category do you put the platypus? A platypus has a duck-shaped bill that is made of soft leathery skin. It has fur, lays eggs, and has webbed feet. When the young are hatched, milk oozes out if the skin of the mother for the young to eat. The male platypus has one half inch long spurs on each hind leg connected to venom glands. The venom is strong enough to kill a dog. If that isn't enough, consider the echidna or spiny anteater. This animal has a long pointy snout and a sticky tongue to eat ants similar to an anteater, has spiny fur like a porcupine, and develops a pouch for it's young to live in after it's eggs hatch! With all of these anomalies, they both are still considered mammals, and belong to the same sub family called the Monotrens. They are the only animals in this sub family.

Scientists like to categorize all living things, but there always seems to be exceptions to the rule. The platypus and echidna seem to fall into almost all categories, but were defined as mammals because they have fur, are warm blooded and lactate milk.