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Your heart beats over 36 million times a year.
There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.
The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.
![Many salmon spawning grounds, such as the Little Qualicum River in British Columbia, consist of wate](https://biology-forums.com/gallery/47/medium_33_31_08_11_2_20_50_1639703.jpeg)
![A number of tree species can be interconnected by mycorrhizal fungi in the forests of British Columb](https://biology-forums.com/gallery/47/medium_33_17_02_12_5_40_33_1989598.jpeg)