The bad news was that the bugs didnât die nearly as quickly as other studies had found, a mere hour or two at -16Â° or -17Â° Celsius. âIn our study, bedbugs survived lower temperatures, with eggs surviving in short-term exposures â¦ to temperatures as low as -25Â° C,â the researchers write. But the bugs are not freeze tolerant, the scientists found, and they can be killed â no matter their stage of life or feeding status.
1 The average weight of the hippopotamus male measures around 1.500 â 1.800 kg (3,300 â 4,000 lb). 2  Males are slightly heavier as compared to females. 3  However, females weigh around 1,300 â 1,500 kg (2,900 â 3,300 lb).
1 The largest species in terms of weight is the hippopotamus (Hippopotamus amphibius), native to the rivers of sub-Saharan Africa. 2  They can attain a size of 4,500 kg (9,900 lb), 4.8 m (16 ft) long and 1.66 m (5.4 ft) tall.