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Alternating CO<sub>2</sub> and bicycloalkane copolymerization to circular polyesters

Nature, Published online: 29 July 2026; doi:10.1038/s41586-026-10848-2

A simple organic catalyst enables direct alternating copolymerization of CO2 with bicycloalkanes to produce high-performance polyesters that can be selectively depolymerized and recycled in a closed-loop lifecycle.
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Magnetic character of the low-energy enhancement in <sup>70</sup>Zn

Nature, Published online: 15 July 2026; doi:10.1038/s41586-026-10758-3

The low-energy enhancement in the Ξ³-ray strength function of 70Zn is due to magnetic dipole transitions between nuclear states.
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