|
|
Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
![Coronary artery bypass graft (CABG). The grafts are often obtained from the patient’s saphenous vein](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_15_45_100282437.jpeg)
![(a) The phagocytic process, beginning in the upper left with bacterial attachment and phagocytic ...](https://biology-forums.com/gallery/31/medium_398119_11_07_17_2_55_16_31464219.jpeg)