Octopuses have three hearts; two branchial hearts that pump blood through each of the gills. The third heart is a systemic heart that pumps blood through the whole body.
Answer: Black Mamba
The Black Mamba can reach up to 12 miles per hour. Don't be too afraid though, the Black Mamba uses its speed to escape danger, not catch prey.
Answer: Meter, Liter & Gram
Portman collaborated (using her birth name, Natalie Hershlag) with Abigail A. Baird, who has a collaboration path (Gazzaniga, Michael S. -> Victor, Jonathan D.) leading to Joseph Gillis, who has an Erdős number of 1.
Answer: Yes, it is!
Adding up the divisors of 8128: 1 + 2 + 4 + 8 + 16 + 32 + 64 + 127 + 254 + 508 + 1016 + 2032 + 4064 = 8128
There are 24 time zones, maybe more. Some time zones are only 30-45 minutes apart.