Oxytocin is a hormone that helps relax and reduce blood pressure and cortisol levels. Oxytocin increases pain thresholds, has anti anxiety effects, and stimulates various types of positive social interaction. In addition, oxytocin promotes growth and healing.

Cloning animals through somatic cell nuclear transfer is simply inefficient. The success rate ranges from 0.1 percent to 3 percent, which means that for every 1000 tries, only one to 30 clones are made. Or you can look at it as 970 to 999 failures in 1000 tries.

The enucleated egg and the transferred nucleus may not be compatible An egg with a newly transferred nucleus may not begin to divide or develop properly Implantation of the embryo into the surrogate mother might fail The pregnancy itself might fail

We’ve long been told our genes are our destiny. But it’s now thought they can be changed by habit, lifestyle, even finances. What does this mean for our children?

In drier, temperate deciduous forests a thick bark helps to limit moisture evaporation from the tree's trunk. Since this is not a concern in the high humidity of tropical rainforests, most trees have a thin, smooth bark. The smoothness of the bark may also make it difficult for other plants to grow on their surface.

The name "Dolly" came from a suggestion by the stockmen who helped with her birth, in honor of Dolly Parton, because it was a mammary cell that was cloned.