Oleg Peshkov was killed when the Turkish air force downed his Su-24 over Syria as he battled terrorists.
Permafrost remains of long-gone woolly rhinos, mammoths and cave lions bring intriguing scientific breakthrough.
Student ran away to Syria with sinister 'recruiter' who wanted her as his 4th wife: now she posts 'vile' messages praising Airbus and Paris terrorists.
Warning of methane blasts in Kara Sea adjacent to Yamal craters caused by gas eruptions associated with melting permafrost due to global warming.
Brain of young female Yuka, preserved in permafrost for 39,000 years, is 'identical' to today's elephants, say scientists.