Every time there is a major disease outbreak, one of the first questions scientists and the public ask is: "Where did this come from?"
"Do I really sound like that?" patients wonder, wincing. (Yes, you do.)
Millions have rolled up their sleeves for the COVID-19 vaccine, but why haven't they rolled up their pants legs instead? Why do we get most shots in our arms?
The first lunar eclipse of 2021 is going to happen during the early hours of May 26.
To create energy, you have to convert matter to energy.
Methane is the world's second most abundant greenhouse gas. It doesn't stay in the atmosphere as long as CO2, but it's many times more potent.
The first draft of the human genome was published 20 years ago in 2001, took nearly three years and cost between US$500 million and $1 billion. The Human Genome Project has allowed scientists to read, almost end to end, the 3 billion pairs of DNA bases - or "letters" - that biologically define a human being.
One surprising star of the coronavirus pandemic response has been the molecule called mRNA. It's the key ingredient in the Pfizer and Moderna COVID-19 vaccines.
Our ancestors evolved many traits that helped them survive in their environments, and we still have many of those traits today.