Karen Weintraub

Scientific American

Latest articles by Karen Weintraub

Woman running in the early morning.

Why Do Some People Need Less Sleep Than Others?

By Karen Weintraub published

New genetic research in mice may reveal why some people need less sleep than others.

Sleep
A human embryo at 5 weeks.

Should the '14-Day Rule' for Growing Human Embryos Get Updated?

By Karen Weintraub published

Ethical guidelines on lab-grown human embryos beg for revamping, scientists say.

Fertility, Pregnancy & Birth
group of baby mice.

Healthy Baby Mice Produced from Mouse Mom's Skin Cells

By Karen Weintraub published

Skin cells from mouse moms were matured in a lab dish and developed into baby mice. The feat is a step toward a similar process that one day may work in humans.

Health