Charles Darwin’s view of the cell differed greatly from the picture we have today. Darwin held to the protoplasmic theory— the idea that the...
Biochemistry
In trying to explain the fine-tuning of the Sun’s age, I will sometimes tell an audience that stars are like people. They are unstable...
Astronomy
Is dark just the absence of light, or does it have some substance? If so, how could you detect it? How dark really is...
Physics & Mathematics