The first stages of DNA evolution

One fundamental question in the field of the Origin of Life is how the first molecules of DNA replicated and evolved on the primordial Earth, more than 4 billion years ago. Before the emergence of the first cells or any other ...

Some polycrystal grain boundaries feel the heat more than others

Polycrystals are solid materials that are made up of lots of small crystals. The points where the crystals meet are known as grain boundaries (GBs). GBs are important because they can affect the way the solid behaves. However, ...

New findings to boost IVF success rates

In vitro fertilization fulfills the wishes of half a million parents each year, yet the fertility treatment leaves plenty of room for improvement. A majority of potential embryos are ruled out for implantation, flagged by ...

Evolution's game of rock-paper-scissors

If B is better than A, and C is better than B, it follows by the transitive property that C is better than A. And, yet, this is not always the case. Every kid is familiar with the Rock-Paper-Scissors game—the epitome of ...

Millie Hughes-Fulford, trailblazing astronaut, dies at 75

Millie Hughes-Fulford, a trailblazing astronaut and scientist who became the first female payload specialist to fly in space for NASA, died following a yearslong battle with cancer, her family said. She was 75.

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