Scientists expand ability of stem cells to regrow any tissue type

When scientists talk about laboratory stem cells being totipotent or pluripotent, they mean that the cells have the potential, like an embryo, to develop into any type of tissue in the body. What totipotent stem cells can ...

Don't kill the messenger RNA

FedEx, UPS, DHL—when it comes to sending packages, choices abound. But the most important delivery service you may not have heard of? mRNA. That's short for messenger RNA, which is how your DNA sends blueprints to the protein-assembly ...

The Internet and your brain are more alike than you think

Although we spend a lot of our time online nowadays—streaming music and video, checking email and social media, or obsessively reading the news—few of us know about the mathematical algorithms that manage how our content ...

Worms have teenage ambivalence, too

Anyone who has allowed a child to "help" with a project quickly learns that kids, no matter how intelligent or eager, are less competent than adults. Teenagers are more capable—but, as every parent knows, teens can be ...

Scientists crack the structure of HIV machinery

Salk Institute scientists have solved the atomic structure of a key piece of machinery that allows HIV to integrate into human host DNA and replicate in the body, which has eluded researchers for decades. The findings describing ...

Collaboration uncovers how molecular machines assemble

Ribosomes—macromolecular machines consisting of RNA and proteins that twist, fold and turn—are responsible for making all of the protein within a cell and could hold the key to deciphering a range of diseases. Despite ...

Disregarded plant molecule actually a treasure

The best natural chemists out there are not scientists—they're plants. Plants have continued to evolve a rich palette of small natural chemicals and receptors since they began to inhabit land roughly 450 million years ago.

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