Kids look at penguins through an underwater viewer at ZSL (the Zoological Society of London) London Zoo on the first day of its reopening since lockdown restrictions eased in London, Britain on June 15, 2020. As non-essential stores reopened and more students headed back to schools in England on Monday for the first time in almost three-months, zoos and safari parks across the country were also allowed to reopen Monday. (Xinhua/Han Yan)

Kids look at penguins through an underwater viewer at ZSL (the Zoological Society of London) London Zoo on the first day of its reopening since lockdown restrictions eased in London, Britain on June 15, 2020. As non-essential stores reopened and more students headed back to schools in England on Monday for the first time in almost three-months, zoos and safari parks across the country were also allowed to reopen Monday. (Xinhua/Han Yan)

A boy looks at penguins at ZSL (the Zoological Society of London) London Zoo on the first day of its reopening since lockdown restrictions eased in London, Britain on June 15, 2020. As non-essential stores reopened and more students headed back to schools in England on Monday for the first time in almost three-months, zoos and safari parks across the country were also allowed to reopen Monday. (Xinhua/Han Yan)

A boy poses with a penguin picture at ZSL (the Zoological Society of London) London Zoo on the first day of its reopening since lockdown restrictions eased in London, Britain on June 15, 2020. As non-essential stores reopened and more students headed back to schools in England on Monday for the first time in almost three-months, zoos and safari parks across the country were also allowed to reopen Monday. (Xinhua/Han Yan)

A girl looks at penguins through an underwater viewer at ZSL (the Zoological Society of London) London Zoo on the first day of its reopening since lockdown restrictions eased in London, Britain on June 15, 2020. As non-essential stores reopened and more students headed back to schools in England on Monday for the first time in almost three-months, zoos and safari parks across the country were also allowed to reopen Monday. (Xinhua/Han Yan)

A girl looks at a giraffe at ZSL (the Zoological Society of London) London Zoo on the first day of its reopening since lockdown restrictions eased in London, Britain on June 15, 2020. As non-essential stores reopened and more students headed back to schools in England on Monday for the first time in almost three-months, zoos and safari parks across the country were also allowed to reopen Monday. (Xinhua/Han Yan)

Visitors walk past llamas at ZSL (the Zoological Society of London) London Zoo on the first day of its reopening since lockdown restrictions eased in London, Britain on June 15, 2020. As non-essential stores reopened and more students headed back to schools in England on Monday for the first time in almost three-months, zoos and safari parks across the country were also allowed to reopen Monday. (Xinhua/Han Yan)

A boy looks at penguins through an underwater viewer at ZSL (the Zoological Society of London) London Zoo on the first day of its reopening since lockdown restrictions eased in London, Britain, on June 15, 2020. As non-essential stores reopened and more students headed back to schools in England on Monday for the first time in almost three-months, zoos and safari parks across the country were also allowed to reopen Monday. (Xinhua/Han Yan)