r/askscience

I live in Australia and the largest land animals I can think of here is probably a kangaroos and emus which really aren’t any larger than a human. But my family recently went to Africa and the diversity animals is actually crazy. So so so many large animals living in the same place side by side. Rhinos, elephants, giraffes, wilder-beasts, zebras, hippos, warthogs, buffalo’s, ostriches, lions, cheetahs, hyenas leopards and probably more that I forgot. I never really appreciated how big these animals were until I actually got to see them in person absolutely amazing. Australia and Africas climate is kinda similar in a lot of places. Why is our country ecosystem dead in comparison?

SI units are more for human convenience than mathematically minimizing the number of units. I remember reading somewhere that only length is needed because of relativity, but that just does not sound true, I can't imagine how you would do that.

Asking the question in the historical context, not to decide on nutrition in the modern day.

I know heating grains helped to unlock some nutrients and especially caloric content over just eating them raw. However did bread provide any nutritional benefits over just boiling the same grain as a porridge (a much simpler process), or was its popularity due to other factors?

genuine question

all living organisms are wired to continue living and reproduce, to have better chance at surviving, we evolve.
how is that possible? when we are subconsciously wired to continue living and reproduce to ensure that we never go extinct?

If yes then does that show a destined reach for the baby in future?

Just curious. The only thing I really know about it is that sleeping reinforces it.

I've read that it's due to a lower tolerance for stress but what does that mean on a scientific level? Thank you