- Flexible active-matrix organic light-emitting diode display enabled by MoS2 thin-film transistor
Highly flexible organic light-emitting diode display was demonstrated using MoS2 TFTs as an active-matrix backplane.
- Experimental entanglement of 25 individually accessible atomic quantum interfaces
As an important step toward quantum networking, a record-high number of atomic quantum interfaces are entangled together.
- Multi-watt, multi-octave, mid-infrared femtosecond source
One-micrometer wavelength ultrafast laser emission is transformed to a powerful tool for ultrabroadband mid-infrared spectroscopy.
- Negative-pressure polymorphs made by heterostructural alloying
Mixing materials with different crystal structures leads to new phases that otherwise would require negative pressure to be made.
- The role of electron irradiation history in liquid cell transmission electron microscopy
New nanofluidic LC-TEM devices enable controlling and understanding electron irradiation history effects on liquid samples.
- Thermodynamic limit for synthesis of metastable inorganic materials
Amorphous forms serve as thermodynamic upper bounds on the free energy scale for synthesis of metastable crystalline polymorphs.
- Nonvolatile infrared memory in MoS2/PbS van der Waals heterostructures
Researchers demonstrate a nonvolatile infrared memory cell operating in the optical communication wavebands.
- Quantum spin Hall insulator with a large bandgap, Dirac fermions, and bilayer graphene analog
We propose a new III–V semiconductor system hosting a large-gap quantum spin Hall insulator and unconventional metal states.
- First observation of the quantized exciton-polariton field and effect of interactions on a single polariton
Polaritons reach the quantum limit, providing a new and promising platform of strongly coherent and interacting particles.
- Low-input and multiplexed microfluidic assay reveals epigenomic variation across cerebellum and prefrontal cortex
A microfluidic technology was developed and used to probe epigenomic differences between prefrontal cortex and cerebellum.
- Dynamic coding of predatory information between the prelimbic cortex and lateral amygdala in foraging rats
We report how the brain codes predatory threat information to guide and shape foraging behaviors in rats.
- Origin of Phobos and Deimos by the impact of a Vesta-to-Ceres sized body with Mars
Phobos and Deimos are likely remnants of a low-mass disk generated by the impact of a Vesta to Ceres-sized body with Mars.
- Noninvasive ovarian cancer biomarker detection via an optical nanosensor implant
Ovarian cancer biomarker detection using a novel nanosensor implant in live mice.
- Decline of genetic diversity in ancient domestic stallions in Europe
Today there are ~56 million horses worldwide, but nearly all of them are descendants of one stallion.
About The Cover
COVER Lingering questions about the evolutionary history of baleen whales are finding answers, thanks to a new genomics study. To date, baleen whales' evolutionary history has been difficult to decipher, in part because of conflicting evidence from genes and morphology. Ulfur Arnason et al. conducted whole genome sequencing of six baleen whale species, several of which had not been sequenced before. The researchers then produced a phylogenetic tree and analyzed "conflicts" in it; formation of new baleen species, they conclude, occurred not via classical Darwinian patterns but instead by a more gradual process. It involved new species evolving from a single ancestral species while still inhabiting the same geographic region. [CREDIT: MEGAN WHITTAKER/ALAMY STOCK PHOTO]