If string theory is correct does it mean that elementary particles like photons, electrons, and quarks don't really exist or does it mean they do but are made of cosmic strings and so therefore are not elementary?
I guess the answer to "is gravity a force?" can be "yes and no".
In the context of general relativity it is not a force, however in most other situations like in designing buildings, bridges etc. it can be referred as a force.
Robert Young, a gerontology researcher who does research on supercentenarians (people who have reached at least 110 years of age) believes that it is possible for people to die of old age.
Apparently "old age" is not a scientifically recognized cause of death. The typical belief by scientists is that people die of diseases that occur in old age, never of old age itself. However some gerontology researchers have disputed such and say that people can indeed die of old age alone.
yeah, it would be extremely difficult to replace all railroad crossings. there's so many of them. if a railroad crossing blocks the only entrance to a neighborhood, i think it should be replaced with an overpass.
wouldn't it be better just to consider birds to be their own class? saying "nonavian reptiles" and "nonavian dinosaurs" is cumbersome. better to reserve the words "reptile" and "dinosaur" for animals that aren't birds. after all, reptile stores don't typically sell birds. that shows that the...
Target's talking about adding small unisex bathrooms in its stores that don't already have one for transgender people to use. Small one person unisex bathrooms are more dangerous. Someone can push someone in there and attack them, and because it's a one person bathroom, no one will come in, see...
I think they worked more or thought so. Work was hard with those primitive tools and took longer and they needed to work a lot to sustain themselves. However I recently read where it was stated that they worked less.
Did hunter gatherers work less or more than modern humans? Apparently consensus is that they worked less. There are those who believe they worked more, that they had to work constantly to sustain themselves and had little free time.