It's possible, but from the situation you've described, it's very unlikely. If the moles are symmetrical in shape, lighter brown as opposed to black, all these are signs that they aren't malignant. The pattern you've described (long term, etc.) is not one I'd immediately associate with melanoma.
Of course, if you have a concern like this, check with your doctor.
Malignant would be the main answer, but another possible one is Cancerous.
R.v
Cancerous.
If not removed, about 15% of moles can become cancerous. They burrow into the wall of the uterus and cause serious bleeding. Another 5% will develop into fast-growing cancers called choriocarcinomas
After Neptune was discovered, they were claims that its orbit didn't seem to be as predicted. This led to the conclusion that it must be disturbed by another massive planet beyond it. Later Pluto was discovered, but it's mass was not large enough to disturb Neptune. For many years astronomers searched for another planet, but it was recently discovered that Neptune's orbit is not as perturbed as once thought, so the "need" for another planet is gone.
Another word for discovered is found.
Myomas are benign. Fibroids is another name for them.
Animal testing is when doctors or scientists illegally inject recently discovered medicines or formulas in animals to see if they die or not. It's just another form of how animals die.
As of now, no concrete evidence of life on another planet has been discovered. Scientists continue to search for signs of extraterrestrial life through various missions and experiments. So, there is no specific person who discovered life on another planet.
Recently.
recent, recently
recently. use a thesaurus.