Kremlin snubs Trump over Putin call as ceasefire doubts grow
The US President's advisers are understood to be very wary of Mr Trump speaking to Vladimir Putin directly at this stage.
Arctic Sea Ice1 天
Vostok Ice Core Chemistry, Timescale, Isotope, and Temperature Data, Version 1
In January 1998, the collaborative ice-drilling project between Russia, the United States, and France at the Russian Vostok station in East Antarctica yielded the deepest ice core ever recovered, ...