"This is shzzzz.. zz... I'm a lost pilot 50 years ago. If you hear my message This may be humanity's last hope. I lost 50 years in space and came back to Earth by accident. But our home has changed... I can't take off my astronaut suit. Because the carbon in the air is too high from the greenhouse effect. Thousands of species have been extinct. Hopeless, but I'm still looking for survivors. And other living things. I sent this message through the last time machine. And if you get it, please correct what we did wrong. Remember, you are hope..."