Over the course of nearly three decades, an uninterrupted series of satellites has circled our planet, diligently measuring sea levels. The continuous record of ocean height that they've built has helped researchers reveal the inner workings of weather phenomena like El Niño and to forecast how much the ocean could encroach on coastlines around the world. Now, engineers and scientists are preparing two identical satellites to add to this legacy, extending the dataset another decade.

Scientists at Harvard University and the Black Hole Initiative (BHI) have developed a new method to find black holes in the outer solar system, and along with it, determine once-and-for-all the true nature of the hypothesized Planet Nine. The paper, accepted to The Astrophysical Journal Letters, highlights the ability of the future Legacy Survey of Space and Time (LSST) mission to observe accretion flares, the presence of which could prove or rule out Planet Nine as a black hole.

The Cage, as the elevator is called, leaves at exactly 7:30 a.m. Latecomers are out of luck.

For many years, the Institute of Experimental Physics at Graz University of Technology and the Styrian industrial company Böhler Edelstahl have been conducting joint research on the surface tension and temperature dependence of different types of steel. "This data is of great importance for both science and industry," explains experimental physicist Gernot Pottlacher. "It demonstrates how the material behaves when it is heated and cooled, that is, how it changes from the solid to the […]

The LHCb collaboration at CERN has announced the discovery of a new exotic particle: a so-called "tetraquark". The paper by more than 800 authors is yet to be evaluated by other scientists in a process called "peer review", but has been presented at a seminar. It also meets the usual statistical threshold for claiming the discovery of a new particle.