In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Q: Time travellers are welcome to attend Stephen Hawking’s memorial service next month. An online ballot to attend the service requires applicants give their date of birth, which can be any day up to December 31, 2038. 
  
 So far all applicants live in the present, according to the Stephen Hawking Foundation, but the door remains open to voyagers in a fourth dimension. 
  
 A spokesman said: “We cannot exclude the possibility of time travel as it has not been disproven to our satisfaction. "All things are possible until proven otherwise. 
  
 "But so far we have had applications from all round the world, and we do mean round - there are no flat-Earthers here." 
  
 The flexible policy suggests the professor undertook his own journey on the subject - over time. ||||| Stephen Hawking’s Interment at Westminster Abbey 
  
 It was a wonderful day. The sun shone as guests streamed into Westminster Abbey in the heart of London. The service was a most beautiful occasion, with moving tributes from Professor Hawking’s family and friends. We will update this site with photos and film from the day as it becomes available, so please keep checking back to find out more. 
  
 You can visit Westminster Abbey to see where the Professor’s ashes are interred. Find out more here: www.westminster-abbey.org/ ||||| Image copyright André Pattenden Image caption Prof Stephen Hawking's life will be celebrated at a service in June 
  
 Organisers of Prof Stephen Hawking's memorial service have seemingly left the door open for time travellers to attend. 
  
 Those wishing to honour the theoretical physicist, who died in March aged 76, can apply via a public ballot. 
  
 Applicants need to give their birth date - which can be any day up to 31 December 2038. 
  
 Prof Hawking's foundation said the possibility of time travel had not been disproven and could not be excluded. 
  
 It was London travel blogger IanVisits who noticed that those born from 2019 to 2038 were theoretically permitted to attend the service at Westminster Abbey. 
  
 He said: "Professor Hawking once threw a party for time travellers, to see if any would turn up if he posted the invite after the party. 
  
 "None did, but it seems perfect that the memorial website allows people born in the future to attend the service. 
  
 "Look out for time travellers at the Abbey." 
  
 Image copyright Jude Edginton/Discovery Communications Image caption In 2009 Discovery Channel filmed the professor waiting for time travellers who never turned up to his party 
  
 After the "time traveller party", held in June 2009, Prof Hawking remarked that the fact that no-one turned up was "experimental evidence that time travel is not possible". 
  
 Within 24 hours of the opening of the ballot for the thanksgiving service, to be held on 15 June, about 12,000 people from more than 50 countries had applied for tickets. 
  
 While all applicants appear to be from the present day, a spokesman for the Stephen Hawking Foundation said: "We cannot exclude the possibility of time travel as it has not been disproven to our satisfaction. 
  
 "All things are possible until proven otherwise. 
  
 "But so far we have had applications from all round the world, and we do mean round - there are no flat-Earthers here." 
  
 People from as far away as the US, China, Bolivia and the South Pacific have asked to attend the event to celebrate the life of Prof Hawking, who died on 14 March, more than 50 years after he was diagnosed with a rare form of motor neurone disease. 
  
 Thousands lined the streets of his home city of Cambridge for his funeral on 31 March. 
  
 The ballot for tickets to his memorial service closes at midnight on 15 May. |||||
A: 
No time travelers showed up at the party Stephen Hawking held for them in 2009, but they'll still be welcome when he's laid to rest. In what was apparently a form of invitation, not an error, people entering the lottery to attend the late professor's memorial service at Westminster Abbey next month need to enter their birthdate on a form that allows dates as far in the future as Dec. 31, 2038, the BBC reports. There have been no applicants from the future so far, but "we cannot exclude the possibility of time travel as it has not been disproven to our satisfaction," a Stephen Hawking Foundation spokesman says. "All things are possible until proven otherwise." "But so far we have had applications from all round the world, and we do mean round—there are no flat-Earthers here," the spokesman says. The lottery for around 1,000 tickets to the service ends at midnight Tuesday, and the application form is here. In a 1992 essay, Hawking suggested that time travel might be possible, but only into the future, the Telegraph notes. That didn't stop him holding his party for time travelers on June 28, 2009. He provided champagne and hors d'oeuvres—but didn't issue invitations until after the event. He said the fact that nobody showed up was "experimental evidence that time travel is not possible." (Hawking submitted a final paper days before his death.)