Scroll down question in Python Selenium Web Crawling.

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys 
from selenium import webdriver
import time

driver = webdriver.Chrome()
url = 'https://pubmed.ncbi.nlm.nih.gov/' 
driver.get(url)  
driver.find_element_by_xpath('/html/body/div[2]/main/div[1]/div/form/div/div[1]/div/span/input').send_keys('human AND well-being AND University')
driver.find_element_by_class_name('search-btn').click()

last_height = driver.execute_script("return document.body.scrollHeight")

while True:
    new_height = driver.execute_script("return document.body.scrollHeight")
    driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
    driver.find_element_by_class_name('load-button.next-page').click()
    time.sleep(1)
    if new_height == last_height:
            try:
                driver.execute_script("window.scrollTo(document.body.scrollHeight, 0);")
            except:
                break
    last_height = new_height