Birds and reptiles, dinosaurs' nearest relatives, reproduce sexually. Birds and reptiles also lay eggs. N.C. State University researcher Mary Schweitzer discovered a medullary bone in the leg of a Tyrannosaurus rex. Birds use this bone to store extra calcium for egg production [source: Fields]....
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Medina, M., Ibarguengoytia, N.R. (2010): How do viviparous and oviparous lizards reproduce in Patag- onia? A comparative study of three species of Li- olaemus. J. Arid. Environm. 74 (9): 1024-1032. DOI:10.1016/j.jaridenv.2010.02.004....
Tail-suspended rats- Rats are suspended head down by their tails in cages for extended periods of time. The tilt reproduces the headward shift of fluids, and inactivity of the hind legs reproduces the deterioration of muscles and bones. KC-135 ''NASA's Vomit Comet"- Ride an airplane thro...
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A brief discussion on Reddit about my post criticizing Penn Station expansion plans led me to write a very long comment, which I'd like to hoist to a full post explaining how big an urban train station needs to be to serve regional and intercity rail tra