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).
The hippo is similar in size to the white rhinoceros. Hippos can store two days' worth of grass in their stomachs and can go up to three weeks without eating. An adult hippo can hold its breath underwater for up to 30 minutes.