Skip to main content

Questions tagged [reproduction]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
14 votes
4 answers
3k views

Do we know why animals have evolved to have sex for reproduction?

I've been reading 13 Things That Don't Make Sense: The Most Intriguing Scientific Mysteries of Our Time (2010) and Chapter 10 concentrates on the subject of Sex. The author argues that we do not know ...
19 votes
2 answers
4k views

Can a pair of rats multiply to 200 within a year?

A story on the BBC News website makes the following claim: Brown rats are one of the planet's most serious mammalian pests, ruining crops and harbouring disease. Expert jumpers, climbers and ...
6 votes
1 answer
597 views

Is it safe for nursing mothers to dye their hair?

My wife has been abstaining from dying her hair during pregnancy. Now the baby is born, I suggested she could use the dye again. She said no. A search online was inconclusive: A pregnant woman at ...