A new study published in Nature shows that all that's needed to mend a "broken heart" is time — and stem cells, says Nature News' Marian Turner. The study shows that natural proteins can activate stem cells in mouse hearts to replace damaged muscle tissue after a heart attack, Turner says. Because cardiomyocytes can't be repaired after a heart attack, they need to be replaced.

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A fire at a Manchester hospital may have destroyed lab equipment and data, the Guardian reports.

Researchers generate a genetic database from skeletal remains from the 1845 Franklin Expedition to the Arctic, Live Science reports.

Researchers in China have begun another trial using CRISPR/Cas9 approaches in cancer patients, according to the Wall Street Journal.

In Science this week: human DNA found in sediments from archeological sites lacking bones, and more.