The rate at which the universe is expanding, known as the Hubble constant, is one of the fundamental parameters for understanding the evolution and ultimate fate of the cosmos. However, a persistent difference called the ...
Astronomy
Sep 12, 2023
109
271
Excavating ancient DNA from teeth, an international group of scientists peered into the lives of a once thriving medieval Ashkenazi Jewish community in Erfurt, Germany. The findings, shared today in the journal Cell, show ...
Archaeology
Nov 30, 2022
0
2337
Cold snaps like the ones that hit the eastern United States in the past winters are not a consequence of climate change. Scientists at ETH Zurich and the California Institute of Technology have shown that global warming actually ...
Earth Sciences
Mar 27, 2015
152
822
The first catalogue of more than a billion stars from ESA's Gaia satellite was published today – the largest all-sky survey of celestial objects to date.
Astronomy
Sep 14, 2016
3
2541
(Phys.org)—Using a photon fission process, physicists have split a single photon into a pair of daughter photons and then split one of the daughter photons into a pair of granddaughters to create a total of three photons. ...
(PhysOrg.com) -- About 550 light-years from Earth, a star like our Sun is writhing in its death throes. Chi Cygni has swollen in size to become a red giant star so large that it would swallow every planet out to Mars in our ...
Astronomy
Dec 15, 2009
5
0
The expanding shell of gas and dust that surrounds the star is about five light-years wide, which equals the distance from here to the nearest star beyond the Sun, Proxima Centauri.
Astronomy
Apr 23, 2021
3
1210
Twenty eminent election forecasters explain their forecasting models and offer their predictions for the 2012 US presidential election, in PS: Political Science and Politics, published by Cambridge University Press for the ...
Social Sciences
Sep 24, 2012
11
0
Climate change's effect on coastal ecosystems is very likely to increase mortality risks of adult oyster populations in the next 20 years.
Earth Sciences
Oct 9, 2018
9
567
CO2 greenhouse gas levels in the atmosphere are likely higher today than ever before in the past 3 million years. During this time, global mean temperatures never exceeded preindustrial levels by more than 2 degrees C. The ...
Earth Sciences
Apr 4, 2019
36
2366
