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).
Cincinnati Zoo staff have begun 24-hour critical care for a baby hippo that was born around six weeks early. The zoo said 17-year-old Bibi gave birth early on Tuesday to the first Nile hippo born there in 75 years. The female calf had not been expected until March and at only 29lb (13kg) it fell well below the normal range of birth weight of 55 to 120lb, the zoo said. It was unable to stand to nurse.