Sleeping to much?

Is there such thing as sleeping too much? Or is there such thing as doing to much? Is there such thing as trying too hard?

The answer probably is yes. In the case of sleeping too much, it being defined by sleeping to the point of negative energy returns. Meaning that you feel more tired as to before you start to sleep. doing too much? I don't know. and trying to hard. I am no authority in the manner. But I just watched a movie that might illustrate the point.

Back in the Second World War, a scientist working on the Manhattan Project was exposed to massive fatal dose of radiation. He was working on the manipulation of two halves of plutonium when the unfortunate incident happens. He lived for a month before he died to radiation sickness. But in that one month, he struggled everyday to understand and continue his work so that he can understand the nature of the problem and prevent the same mistakes from happening to others. He succeeded.

On another note, another scientist working on a exotic power generation project met with much the same fate. He did not die but one man under his command did. It gave him the same impetus to strive harder to understand the problem. he is fully confident that he can contain that mistake and make the project successful. In the end, he didn't and was forced to evacuate before the process self-destruct. He didn't die, but his over-confidance and ego almost got his friends killed.

Now, is the second case sound as if he is trying too hard?