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[30] [145] The open niche space and relative scarcity of predators following the K-Pg extinction allowed for adaptive radiation of various avian groups. Ratites , for example, rapidly diversified in the early Paleogene and are believed to have convergently developed flightlessness at least three to six times, often fulfilling the niche space ...
The density at the surface is 65 kg/m 3 (4.1 lb/cu ft), 6.5% that of water [88] or 50 times as dense as Earth's atmosphere at 293 K (20 °C; 68 °F) at sea level. The CO 2 -rich atmosphere generates the strongest greenhouse effect in the Solar System, creating surface temperatures of at least 735 K (462 °C; 864 °F).
Japan has a total fertility rate of 1.4, which is below the replacement rate of 2.1, and is among the world's lowest; [236] it has a median age of 48.4, the highest in the world. [237] As of 2020 [update] , over 28.7 percent of the population is over 65, or more than one in four out of the Japanese population. [ 234 ]
Franchet d'Esperey, to the right of the BEF, was repeatedly demanding a quicker advance, and at 3.30 pm Sir John ordered Haig (I Corps, on the BEF right) to resume his advance, but by nightfall Haig was still 12 km away from his objective, having lost only 7 men killed and 44 wounded. The BEF advanced further on 7 September.