One megayear, or 1 MYA (million years ago).
It is highly unlikely. A million years is a short time on a geologic timescale. Earth will remain habitable for a few hundred million years into the future.
1-1.8 million years ago was approximately 0.2-0.8 million years ago.
1 million (1000000)
I think the answer you are looking for is: 1 Million Years = 1 mellophone
There are 1000 sets of 1 million years in a billion years.
1 million days = about 2,737.9 years.
1 million days = 2,737.9 years.
Using the "short scale" number names (new name every thousand), "one thousand million years" is a "billion years", the metric equivalent being a "gigaannum" (1 Ga). (see link)
In English-speaking countries, "trillion" usually means a million million (1012). In some other countries, it may mean a million million million (1018). Even with the first definition (the "short scale", a trillion years is much more than the age of the Universe.
A thousand million years equals 1 billion years.
The M is short for Mega, which is 1 million. The Hz is short for Hertz, the measure of frequency. MHz is therefore short for Mega Hertz, or 1 million Hertz.
The air 1 million years ago was pretty much the same as it is now.