Uncategorized

Climate

Readers question dark fusion, Antarctic ice melting and more

Readers had questions about Antarctic ice melting, dark fusion and greenhouse gas emissions.

Genetics

Researchers say CRISPR edits to a human embryo worked. But critics still doubt it

Researchers say that they have confirmed CRISPR/Cas9 edits of a heart disease–causing version of a gene, but critics still have doubts.

Archaeology

The debate over people’s pathway into the Americas heats up

Defenders of an ice-free inland passage for early Americans make their case.

Earth

Global dimming may mitigate warming, but could hurt crop yields

Injecting a veil of tiny particles into the atmosphere might reduce global warming, but it could also lower crop yields.