R: Error in Reading a .DAT file directly from website

I'm trying to read a .DAT file directly from the website and getting the following error:

abdomen <- read.table("https://www2.stat.duke.edu/courses/Spring03/sta113/Data/Hand/abdomen.dat")

Error in file(file, "rt") : 
  cannot open the connection to 'https://www2.stat.duke.edu/courses/Spring03/sta113/Data/Hand/abdomen.dat'
In addition: Warning messages:
1: In eval(formal.args[[as.character(substitute(arg))]], envir = sys.frame(sysP)) :
  closing unused connection 4 (https://www2.stat.duke.edu/courses/Spring03/sta113/Data/Hand/abdomen.dat)
2: In file(file, "rt") :
  URL 'https://www2.stat.duke.edu/courses/Spring03/sta113/Data/Hand/abdomen.dat': status was 'Peer certificate cannot be authenticated with given CA certificates'

I also tried the following code:

abdomen <- read.table(url("https://www2.stat.duke.edu/courses/Spring03/sta113/Data/Hand/abdomen.dat"))
Error in open.connection(file, "rt") : 
  cannot open the connection to 'https://www2.stat.duke.edu/courses/Spring03/sta113/Data/Hand/abdomen.dat'
In addition: Warning message:
In open.connection(file, "rt") :
  URL 'https://www2.stat.duke.edu/courses/Spring03/sta113/Data/Hand/abdomen.dat': status was 'Peer certificate cannot be authenticated with given CA certificates'

Any hint, please.